diff --git a/regex-syntax/src/ast/mod.rs b/regex-syntax/src/ast/mod.rs
index 6cd0bc48f4..d73eda16dd 100644
--- a/regex-syntax/src/ast/mod.rs
+++ b/regex-syntax/src/ast/mod.rs
@@ -175,43 +175,7 @@ pub enum ErrorKind {
     __Nonexhaustive,
 }
 
-impl error::Error for Error {
-    fn description(&self) -> &str {
-        use self::ErrorKind::*;
-        match self.kind {
-            CaptureLimitExceeded => "capture group limit exceeded",
-            ClassEscapeInvalid => "invalid escape sequence in character class",
-            ClassRangeInvalid => "invalid character class range",
-            ClassRangeLiteral => "invalid range boundary, must be a literal",
-            ClassUnclosed => "unclosed character class",
-            DecimalEmpty => "empty decimal literal",
-            DecimalInvalid => "invalid decimal literal",
-            EscapeHexEmpty => "empty hexadecimal literal",
-            EscapeHexInvalid => "invalid hexadecimal literal",
-            EscapeHexInvalidDigit => "invalid hexadecimal digit",
-            EscapeUnexpectedEof => "unexpected eof (escape sequence)",
-            EscapeUnrecognized => "unrecognized escape sequence",
-            FlagDanglingNegation => "dangling flag negation operator",
-            FlagDuplicate { .. } => "duplicate flag",
-            FlagRepeatedNegation { .. } => "repeated negation",
-            FlagUnexpectedEof => "unexpected eof (flag)",
-            FlagUnrecognized => "unrecognized flag",
-            GroupNameDuplicate { .. } => "duplicate capture group name",
-            GroupNameEmpty => "empty capture group name",
-            GroupNameInvalid => "invalid capture group name",
-            GroupNameUnexpectedEof => "unclosed capture group name",
-            GroupUnclosed => "unclosed group",
-            GroupUnopened => "unopened group",
-            NestLimitExceeded(_) => "nest limit exceeded",
-            RepetitionCountInvalid => "invalid repetition count range",
-            RepetitionCountUnclosed => "unclosed counted repetition",
-            RepetitionMissing => "repetition operator missing expression",
-            UnsupportedBackreference => "backreferences are not supported",
-            UnsupportedLookAround => "look-around is not supported",
-            _ => unreachable!(),
-        }
-    }
-}
+impl error::Error for Error {}
 
 impl fmt::Display for Error {
     fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
diff --git a/regex-syntax/src/error.rs b/regex-syntax/src/error.rs
index 464148e3dd..5d2e832c52 100644
--- a/regex-syntax/src/error.rs
+++ b/regex-syntax/src/error.rs
@@ -39,15 +39,7 @@ impl From<hir::Error> for Error {
     }
 }
 
-impl error::Error for Error {
-    fn description(&self) -> &str {
-        match *self {
-            Error::Parse(ref x) => x.description(),
-            Error::Translate(ref x) => x.description(),
-            _ => unreachable!(),
-        }
-    }
-}
+impl error::Error for Error {}
 
 impl fmt::Display for Error {
     fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
diff --git a/regex-syntax/src/hir/mod.rs b/regex-syntax/src/hir/mod.rs
index ee08e83dba..0c4705f87b 100644
--- a/regex-syntax/src/hir/mod.rs
+++ b/regex-syntax/src/hir/mod.rs
@@ -112,11 +112,7 @@ impl ErrorKind {
     }
 }
 
-impl error::Error for Error {
-    fn description(&self) -> &str {
-        self.kind.description()
-    }
-}
+impl error::Error for Error {}
 
 impl fmt::Display for Error {
     fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
diff --git a/regex-syntax/src/unicode_tables/property_bool.rs b/regex-syntax/src/unicode_tables/property_bool.rs
index 59713a882e..efe6eb369d 100644
--- a/regex-syntax/src/unicode_tables/property_bool.rs
+++ b/regex-syntax/src/unicode_tables/property_bool.rs
@@ -8203,12 +8203,8 @@ pub const OTHER_GRAPHEME_EXTEND: &'static [(char, char)] = &[
 pub const OTHER_ID_CONTINUE: &'static [(char, char)] =
     &[('·', '·'), ('·', '·'), ('፩', '፱'), ('᧚', '᧚')];
 
-pub const OTHER_ID_START: &'static [(char, char)] = &[
-    ('\u{1885}', '\u{1886}'),
-    ('℘', '℘'),
-    ('℮', '℮'),
-    ('゛', '゜'),
-];
+pub const OTHER_ID_START: &'static [(char, char)] =
+    &[('\u{1885}', '\u{1886}'), ('℘', '℘'), ('℮', '℮'), ('゛', '゜')];
 
 pub const OTHER_LOWERCASE: &'static [(char, char)] = &[
     ('ª', 'ª'),
@@ -8370,13 +8366,8 @@ pub const OTHER_MATH: &'static [(char, char)] = &[
     ('𞺫', '𞺻'),
 ];
 
-pub const OTHER_UPPERCASE: &'static [(char, char)] = &[
-    ('Ⅰ', 'Ⅿ'),
-    ('Ⓐ', 'Ⓩ'),
-    ('🄰', '🅉'),
-    ('🅐', '🅩'),
-    ('🅰', '🆉'),
-];
+pub const OTHER_UPPERCASE: &'static [(char, char)] =
+    &[('Ⅰ', 'Ⅿ'), ('Ⓐ', 'Ⓩ'), ('🄰', '🅉'), ('🅐', '🅩'), ('🅰', '🆉')];
 
 pub const PATTERN_SYNTAX: &'static [(char, char)] = &[
     ('!', '/'),
diff --git a/regex-syntax/src/unicode_tables/script.rs b/regex-syntax/src/unicode_tables/script.rs
index 12ddf0167f..19dbc38e56 100644
--- a/regex-syntax/src/unicode_tables/script.rs
+++ b/regex-syntax/src/unicode_tables/script.rs
@@ -230,11 +230,9 @@ pub const ARABIC: &'static [(char, char)] = &[
 pub const ARMENIAN: &'static [(char, char)] =
     &[('Ա', 'Ֆ'), ('ՙ', 'ֈ'), ('֊', '֊'), ('֍', '֏'), ('ﬓ', 'ﬗ')];
 
-pub const AVESTAN: &'static [(char, char)] =
-    &[('𐬀', '𐬵'), ('𐬹', '𐬿')];
+pub const AVESTAN: &'static [(char, char)] = &[('𐬀', '𐬵'), ('𐬹', '𐬿')];
 
-pub const BALINESE: &'static [(char, char)] =
-    &[('\u{1b00}', 'ᭋ'), ('᭐', '᭼')];
+pub const BALINESE: &'static [(char, char)] = &[('\u{1b00}', 'ᭋ'), ('᭐', '᭼')];
 
 pub const BAMUM: &'static [(char, char)] = &[('ꚠ', '꛷'), ('𖠀', '𖨸')];
 
@@ -260,12 +258,8 @@ pub const BENGALI: &'static [(char, char)] = &[
     ('০', '\u{9fe}'),
 ];
 
-pub const BHAIKSUKI: &'static [(char, char)] = &[
-    ('𑰀', '𑰈'),
-    ('𑰊', '\u{11c36}'),
-    ('\u{11c38}', '𑱅'),
-    ('𑱐', '𑱬'),
-];
+pub const BHAIKSUKI: &'static [(char, char)] =
+    &[('𑰀', '𑰈'), ('𑰊', '\u{11c36}'), ('\u{11c38}', '𑱅'), ('𑱐', '𑱬')];
 
 pub const BOPOMOFO: &'static [(char, char)] =
     &[('˪', '˫'), ('ㄅ', 'ㄯ'), ('ㆠ', 'ㆺ')];
@@ -275,8 +269,7 @@ pub const BRAHMI: &'static [(char, char)] =
 
 pub const BRAILLE: &'static [(char, char)] = &[('⠀', '⣿')];
 
-pub const BUGINESE: &'static [(char, char)] =
-    &[('ᨀ', '\u{1a1b}'), ('᨞', '᨟')];
+pub const BUGINESE: &'static [(char, char)] = &[('ᨀ', '\u{1a1b}'), ('᨞', '᨟')];
 
 pub const BUHID: &'static [(char, char)] = &[('ᝀ', '\u{1753}')];
 
@@ -478,14 +471,8 @@ pub const COPTIC: &'static [(char, char)] =
 pub const CUNEIFORM: &'static [(char, char)] =
     &[('𒀀', '𒎙'), ('𒐀', '𒑮'), ('𒑰', '𒑴'), ('𒒀', '𒕃')];
 
-pub const CYPRIOT: &'static [(char, char)] = &[
-    ('𐠀', '𐠅'),
-    ('𐠈', '𐠈'),
-    ('𐠊', '𐠵'),
-    ('𐠷', '𐠸'),
-    ('𐠼', '𐠼'),
-    ('𐠿', '𐠿'),
-];
+pub const CYPRIOT: &'static [(char, char)] =
+    &[('𐠀', '𐠅'), ('𐠈', '𐠈'), ('𐠊', '𐠵'), ('𐠷', '𐠸'), ('𐠼', '𐠼'), ('𐠿', '𐠿')];
 
 pub const CYRILLIC: &'static [(char, char)] = &[
     ('Ѐ', '\u{484}'),
@@ -509,13 +496,8 @@ pub const DEVANAGARI: &'static [(char, char)] = &[
 
 pub const DOGRA: &'static [(char, char)] = &[('𑠀', '𑠻')];
 
-pub const DUPLOYAN: &'static [(char, char)] = &[
-    ('𛰀', '𛱪'),
-    ('𛱰', '𛱼'),
-    ('𛲀', '𛲈'),
-    ('𛲐', '𛲙'),
-    ('𛲜', '𛲟'),
-];
+pub const DUPLOYAN: &'static [(char, char)] =
+    &[('𛰀', '𛱪'), ('𛱰', '𛱼'), ('𛲀', '𛲈'), ('𛲐', '𛲙'), ('𛲜', '𛲟')];
 
 pub const EGYPTIAN_HIEROGLYPHS: &'static [(char, char)] =
     &[('𓀀', '𓐮'), ('\u{13430}', '\u{13438}')];
@@ -825,8 +807,7 @@ pub const KATAKANA: &'static [(char, char)] = &[
     ('\u{1b164}', '\u{1b167}'),
 ];
 
-pub const KAYAH_LI: &'static [(char, char)] =
-    &[('꤀', '\u{a92d}'), ('꤯', '꤯')];
+pub const KAYAH_LI: &'static [(char, char)] = &[('꤀', '\u{a92d}'), ('꤯', '꤯')];
 
 pub const KHAROSHTHI: &'static [(char, char)] = &[
     ('𐨀', '\u{10a03}'),
@@ -842,8 +823,7 @@ pub const KHAROSHTHI: &'static [(char, char)] = &[
 pub const KHMER: &'static [(char, char)] =
     &[('ក', '\u{17dd}'), ('០', '៩'), ('៰', '៹'), ('᧠', '᧿')];
 
-pub const KHOJKI: &'static [(char, char)] =
-    &[('𑈀', '𑈑'), ('𑈓', '\u{1123e}')];
+pub const KHOJKI: &'static [(char, char)] = &[('𑈀', '𑈑'), ('𑈓', '\u{1123e}')];
 
 pub const KHUDAWADI: &'static [(char, char)] =
     &[('𑊰', '\u{112ea}'), ('𑋰', '𑋹')];
@@ -925,8 +905,7 @@ pub const LISU: &'static [(char, char)] = &[('ꓐ', '꓿')];
 
 pub const LYCIAN: &'static [(char, char)] = &[('𐊀', '𐊜')];
 
-pub const LYDIAN: &'static [(char, char)] =
-    &[('𐤠', '𐤹'), ('𐤿', '𐤿')];
+pub const LYDIAN: &'static [(char, char)] = &[('𐤠', '𐤹'), ('𐤿', '𐤿')];
 
 pub const MAHAJANI: &'static [(char, char)] = &[('𑅐', '𑅶')];
 
@@ -943,8 +922,7 @@ pub const MALAYALAM: &'static [(char, char)] = &[
     ('൦', 'ൿ'),
 ];
 
-pub const MANDAIC: &'static [(char, char)] =
-    &[('ࡀ', '\u{85b}'), ('࡞', '࡞')];
+pub const MANDAIC: &'static [(char, char)] = &[('ࡀ', '\u{85b}'), ('࡞', '࡞')];
 
 pub const MANICHAEAN: &'static [(char, char)] =
     &[('𐫀', '\u{10ae6}'), ('𐫫', '𐫶')];
@@ -975,14 +953,10 @@ pub const MEROITIC_CURSIVE: &'static [(char, char)] =
 
 pub const MEROITIC_HIEROGLYPHS: &'static [(char, char)] = &[('𐦀', '𐦟')];
 
-pub const MIAO: &'static [(char, char)] = &[
-    ('𖼀', '\u{16f4a}'),
-    ('\u{16f4f}', '\u{16f87}'),
-    ('\u{16f8f}', '𖾟'),
-];
+pub const MIAO: &'static [(char, char)] =
+    &[('𖼀', '\u{16f4a}'), ('\u{16f4f}', '\u{16f87}'), ('\u{16f8f}', '𖾟')];
 
-pub const MODI: &'static [(char, char)] =
-    &[('𑘀', '𑙄'), ('𑙐', '𑙙')];
+pub const MODI: &'static [(char, char)] = &[('𑘀', '𑙄'), ('𑙐', '𑙙')];
 
 pub const MONGOLIAN: &'static [(char, char)] = &[
     ('᠀', '᠁'),
@@ -994,22 +968,15 @@ pub const MONGOLIAN: &'static [(char, char)] = &[
     ('𑙠', '𑙬'),
 ];
 
-pub const MRO: &'static [(char, char)] =
-    &[('𖩀', '𖩞'), ('𖩠', '𖩩'), ('𖩮', '𖩯')];
+pub const MRO: &'static [(char, char)] = &[('𖩀', '𖩞'), ('𖩠', '𖩩'), ('𖩮', '𖩯')];
 
-pub const MULTANI: &'static [(char, char)] = &[
-    ('𑊀', '𑊆'),
-    ('𑊈', '𑊈'),
-    ('𑊊', '𑊍'),
-    ('𑊏', '𑊝'),
-    ('𑊟', '𑊩'),
-];
+pub const MULTANI: &'static [(char, char)] =
+    &[('𑊀', '𑊆'), ('𑊈', '𑊈'), ('𑊊', '𑊍'), ('𑊏', '𑊝'), ('𑊟', '𑊩')];
 
 pub const MYANMAR: &'static [(char, char)] =
     &[('က', '႟'), ('ꧠ', 'ꧾ'), ('ꩠ', 'ꩿ')];
 
-pub const NABATAEAN: &'static [(char, char)] =
-    &[('𐢀', '𐢞'), ('𐢧', '𐢯')];
+pub const NABATAEAN: &'static [(char, char)] = &[('𐢀', '𐢞'), ('𐢧', '𐢯')];
 
 pub const NANDINAGARI: &'static [(char, char)] = &[
     ('\u{119a0}', '\u{119a7}'),
@@ -1025,8 +992,7 @@ pub const NEWA: &'static [(char, char)] =
 
 pub const NKO: &'static [(char, char)] = &[('߀', 'ߺ'), ('\u{7fd}', '߿')];
 
-pub const NUSHU: &'static [(char, char)] =
-    &[('𖿡', '𖿡'), ('𛅰', '𛋻')];
+pub const NUSHU: &'static [(char, char)] = &[('𖿡', '𖿡'), ('𛅰', '𛋻')];
 
 pub const NYIAKENG_PUACHUE_HMONG: &'static [(char, char)] = &[
     ('\u{1e100}', '\u{1e12c}'),
@@ -1042,15 +1008,13 @@ pub const OL_CHIKI: &'static [(char, char)] = &[('᱐', '᱿')];
 pub const OLD_HUNGARIAN: &'static [(char, char)] =
     &[('𐲀', '𐲲'), ('𐳀', '𐳲'), ('𐳺', '𐳿')];
 
-pub const OLD_ITALIC: &'static [(char, char)] =
-    &[('𐌀', '𐌣'), ('𐌭', '𐌯')];
+pub const OLD_ITALIC: &'static [(char, char)] = &[('𐌀', '𐌣'), ('𐌭', '𐌯')];
 
 pub const OLD_NORTH_ARABIAN: &'static [(char, char)] = &[('𐪀', '𐪟')];
 
 pub const OLD_PERMIC: &'static [(char, char)] = &[('𐍐', '\u{1037a}')];
 
-pub const OLD_PERSIAN: &'static [(char, char)] =
-    &[('𐎠', '𐏃'), ('𐏈', '𐏕')];
+pub const OLD_PERSIAN: &'static [(char, char)] = &[('𐎠', '𐏃'), ('𐏈', '𐏕')];
 
 pub const OLD_SOGDIAN: &'static [(char, char)] = &[('𐼀', '𐼧')];
 
@@ -1075,19 +1039,12 @@ pub const ORIYA: &'static [(char, char)] = &[
     ('୦', '୷'),
 ];
 
-pub const OSAGE: &'static [(char, char)] =
-    &[('𐒰', '𐓓'), ('𐓘', '𐓻')];
+pub const OSAGE: &'static [(char, char)] = &[('𐒰', '𐓓'), ('𐓘', '𐓻')];
 
-pub const OSMANYA: &'static [(char, char)] =
-    &[('𐒀', '𐒝'), ('𐒠', '𐒩')];
+pub const OSMANYA: &'static [(char, char)] = &[('𐒀', '𐒝'), ('𐒠', '𐒩')];
 
-pub const PAHAWH_HMONG: &'static [(char, char)] = &[
-    ('𖬀', '𖭅'),
-    ('𖭐', '𖭙'),
-    ('𖭛', '𖭡'),
-    ('𖭣', '𖭷'),
-    ('𖭽', '𖮏'),
-];
+pub const PAHAWH_HMONG: &'static [(char, char)] =
+    &[('𖬀', '𖭅'), ('𖭐', '𖭙'), ('𖭛', '𖭡'), ('𖭣', '𖭷'), ('𖭽', '𖮏')];
 
 pub const PALMYRENE: &'static [(char, char)] = &[('𐡠', '𐡿')];
 
@@ -1095,8 +1052,7 @@ pub const PAU_CIN_HAU: &'static [(char, char)] = &[('𑫀', '𑫸')];
 
 pub const PHAGS_PA: &'static [(char, char)] = &[('ꡀ', '꡷')];
 
-pub const PHOENICIAN: &'static [(char, char)] =
-    &[('𐤀', '𐤛'), ('𐤟', '𐤟')];
+pub const PHOENICIAN: &'static [(char, char)] = &[('𐤀', '𐤛'), ('𐤟', '𐤟')];
 
 pub const PSALTER_PAHLAVI: &'static [(char, char)] =
     &[('𐮀', '𐮑'), ('𐮙', '𐮜'), ('𐮩', '𐮯')];
@@ -1105,25 +1061,20 @@ pub const REJANG: &'static [(char, char)] = &[('ꤰ', '꥓'), ('꥟', '꥟')];
 
 pub const RUNIC: &'static [(char, char)] = &[('ᚠ', 'ᛪ'), ('ᛮ', 'ᛸ')];
 
-pub const SAMARITAN: &'static [(char, char)] =
-    &[('ࠀ', '\u{82d}'), ('࠰', '࠾')];
+pub const SAMARITAN: &'static [(char, char)] = &[('ࠀ', '\u{82d}'), ('࠰', '࠾')];
 
 pub const SAURASHTRA: &'static [(char, char)] =
     &[('ꢀ', '\u{a8c5}'), ('꣎', '꣙')];
 
-pub const SHARADA: &'static [(char, char)] =
-    &[('\u{11180}', '𑇍'), ('𑇐', '𑇟')];
+pub const SHARADA: &'static [(char, char)] = &[('\u{11180}', '𑇍'), ('𑇐', '𑇟')];
 
 pub const SHAVIAN: &'static [(char, char)] = &[('𐑐', '𐑿')];
 
 pub const SIDDHAM: &'static [(char, char)] =
     &[('𑖀', '\u{115b5}'), ('𑖸', '\u{115dd}')];
 
-pub const SIGNWRITING: &'static [(char, char)] = &[
-    ('𝠀', '𝪋'),
-    ('\u{1da9b}', '\u{1da9f}'),
-    ('\u{1daa1}', '\u{1daaf}'),
-];
+pub const SIGNWRITING: &'static [(char, char)] =
+    &[('𝠀', '𝪋'), ('\u{1da9b}', '\u{1da9f}'), ('\u{1daa1}', '\u{1daaf}')];
 
 pub const SINHALA: &'static [(char, char)] = &[
     ('ං', 'ඃ'),
@@ -1143,8 +1094,7 @@ pub const SINHALA: &'static [(char, char)] = &[
 
 pub const SOGDIAN: &'static [(char, char)] = &[('𐼰', '𐽙')];
 
-pub const SORA_SOMPENG: &'static [(char, char)] =
-    &[('𑃐', '𑃨'), ('𑃰', '𑃹')];
+pub const SORA_SOMPENG: &'static [(char, char)] = &[('𑃐', '𑃨'), ('𑃰', '𑃹')];
 
 pub const SOYOMBO: &'static [(char, char)] = &[('𑩐', '𑪢')];
 
@@ -1156,8 +1106,7 @@ pub const SYLOTI_NAGRI: &'static [(char, char)] = &[('ꠀ', '꠫')];
 pub const SYRIAC: &'static [(char, char)] =
     &[('܀', '܍'), ('\u{70f}', '\u{74a}'), ('ݍ', 'ݏ'), ('ࡠ', 'ࡪ')];
 
-pub const TAGALOG: &'static [(char, char)] =
-    &[('ᜀ', 'ᜌ'), ('ᜎ', '\u{1714}')];
+pub const TAGALOG: &'static [(char, char)] = &[('ᜀ', 'ᜌ'), ('ᜎ', '\u{1714}')];
 
 pub const TAGBANWA: &'static [(char, char)] =
     &[('ᝠ', 'ᝬ'), ('ᝮ', 'ᝰ'), ('\u{1772}', '\u{1773}')];
@@ -1172,11 +1121,9 @@ pub const TAI_THAM: &'static [(char, char)] = &[
     ('᪠', '᪭'),
 ];
 
-pub const TAI_VIET: &'static [(char, char)] =
-    &[('ꪀ', 'ꫂ'), ('ꫛ', '꫟')];
+pub const TAI_VIET: &'static [(char, char)] = &[('ꪀ', 'ꫂ'), ('ꫛ', '꫟')];
 
-pub const TAKRI: &'static [(char, char)] =
-    &[('𑚀', '\u{116b8}'), ('𑛀', '𑛉')];
+pub const TAKRI: &'static [(char, char)] = &[('𑚀', '\u{116b8}'), ('𑛀', '𑛉')];
 
 pub const TAMIL: &'static [(char, char)] = &[
     ('\u{b82}', 'ஃ'),
@@ -1219,8 +1166,7 @@ pub const TELUGU: &'static [(char, char)] = &[
 
 pub const THAANA: &'static [(char, char)] = &[('ހ', 'ޱ')];
 
-pub const THAI: &'static [(char, char)] =
-    &[('ก', '\u{e3a}'), ('เ', '๛')];
+pub const THAI: &'static [(char, char)] = &[('ก', '\u{e3a}'), ('เ', '๛')];
 
 pub const TIBETAN: &'static [(char, char)] = &[
     ('ༀ', 'ཇ'),
@@ -1235,19 +1181,16 @@ pub const TIBETAN: &'static [(char, char)] = &[
 pub const TIFINAGH: &'static [(char, char)] =
     &[('ⴰ', 'ⵧ'), ('ⵯ', '⵰'), ('\u{2d7f}', '\u{2d7f}')];
 
-pub const TIRHUTA: &'static [(char, char)] =
-    &[('𑒀', '𑓇'), ('𑓐', '𑓙')];
+pub const TIRHUTA: &'static [(char, char)] = &[('𑒀', '𑓇'), ('𑓐', '𑓙')];
 
-pub const UGARITIC: &'static [(char, char)] =
-    &[('𐎀', '𐎝'), ('𐎟', '𐎟')];
+pub const UGARITIC: &'static [(char, char)] = &[('𐎀', '𐎝'), ('𐎟', '𐎟')];
 
 pub const VAI: &'static [(char, char)] = &[('ꔀ', 'ꘫ')];
 
 pub const WANCHO: &'static [(char, char)] =
     &[('\u{1e2c0}', '\u{1e2f9}'), ('\u{1e2ff}', '\u{1e2ff}')];
 
-pub const WARANG_CITI: &'static [(char, char)] =
-    &[('𑢠', '𑣲'), ('𑣿', '𑣿')];
+pub const WARANG_CITI: &'static [(char, char)] = &[('𑢠', '𑣲'), ('𑣿', '𑣿')];
 
 pub const YI: &'static [(char, char)] = &[('ꀀ', 'ꒌ'), ('꒐', '꓆')];
 
diff --git a/regex-syntax/src/unicode_tables/script_extension.rs b/regex-syntax/src/unicode_tables/script_extension.rs
index a86b17eb22..aa3894e575 100644
--- a/regex-syntax/src/unicode_tables/script_extension.rs
+++ b/regex-syntax/src/unicode_tables/script_extension.rs
@@ -225,11 +225,9 @@ pub const ARABIC: &'static [(char, char)] = &[
 pub const ARMENIAN: &'static [(char, char)] =
     &[('Ա', 'Ֆ'), ('ՙ', '֊'), ('֍', '֏'), ('ﬓ', 'ﬗ')];
 
-pub const AVESTAN: &'static [(char, char)] =
-    &[('𐬀', '𐬵'), ('𐬹', '𐬿')];
+pub const AVESTAN: &'static [(char, char)] = &[('𐬀', '𐬵'), ('𐬹', '𐬿')];
 
-pub const BALINESE: &'static [(char, char)] =
-    &[('\u{1b00}', 'ᭋ'), ('᭐', '᭼')];
+pub const BALINESE: &'static [(char, char)] = &[('\u{1b00}', 'ᭋ'), ('᭐', '᭼')];
 
 pub const BAMUM: &'static [(char, char)] = &[('ꚠ', '꛷'), ('𖠀', '𖨸')];
 
@@ -267,12 +265,8 @@ pub const BENGALI: &'static [(char, char)] = &[
     ('\u{a8f1}', '\u{a8f1}'),
 ];
 
-pub const BHAIKSUKI: &'static [(char, char)] = &[
-    ('𑰀', '𑰈'),
-    ('𑰊', '\u{11c36}'),
-    ('\u{11c38}', '𑱅'),
-    ('𑱐', '𑱬'),
-];
+pub const BHAIKSUKI: &'static [(char, char)] =
+    &[('𑰀', '𑰈'), ('𑰊', '\u{11c36}'), ('\u{11c38}', '𑱅'), ('𑱐', '𑱬')];
 
 pub const BOPOMOFO: &'static [(char, char)] = &[
     ('˪', '˫'),
@@ -297,8 +291,7 @@ pub const BRAILLE: &'static [(char, char)] = &[('⠀', '⣿')];
 pub const BUGINESE: &'static [(char, char)] =
     &[('ᨀ', '\u{1a1b}'), ('᨞', '᨟'), ('ꧏ', 'ꧏ')];
 
-pub const BUHID: &'static [(char, char)] =
-    &[('᜵', '᜶'), ('ᝀ', '\u{1753}')];
+pub const BUHID: &'static [(char, char)] = &[('᜵', '᜶'), ('ᝀ', '\u{1753}')];
 
 pub const CANADIAN_ABORIGINAL: &'static [(char, char)] =
     &[('᐀', 'ᙿ'), ('ᢰ', 'ᣵ')];
@@ -308,12 +301,8 @@ pub const CARIAN: &'static [(char, char)] = &[('𐊠', '𐋐')];
 pub const CAUCASIAN_ALBANIAN: &'static [(char, char)] =
     &[('𐔰', '𐕣'), ('𐕯', '𐕯')];
 
-pub const CHAKMA: &'static [(char, char)] = &[
-    ('০', '৯'),
-    ('၀', '၉'),
-    ('\u{11100}', '\u{11134}'),
-    ('𑄶', '𑅆'),
-];
+pub const CHAKMA: &'static [(char, char)] =
+    &[('০', '৯'), ('၀', '၉'), ('\u{11100}', '\u{11134}'), ('𑄶', '𑅆')];
 
 pub const CHAM: &'static [(char, char)] =
     &[('ꨀ', '\u{aa36}'), ('ꩀ', 'ꩍ'), ('꩐', '꩙'), ('꩜', '꩟')];
@@ -514,13 +503,8 @@ pub const DEVANAGARI: &'static [(char, char)] = &[
 pub const DOGRA: &'static [(char, char)] =
     &[('।', '९'), ('꠰', '꠹'), ('𑠀', '𑠻')];
 
-pub const DUPLOYAN: &'static [(char, char)] = &[
-    ('𛰀', '𛱪'),
-    ('𛱰', '𛱼'),
-    ('𛲀', '𛲈'),
-    ('𛲐', '𛲙'),
-    ('𛲜', '\u{1bca3}'),
-];
+pub const DUPLOYAN: &'static [(char, char)] =
+    &[('𛰀', '𛱪'), ('𛱰', '𛱼'), ('𛲀', '𛲈'), ('𛲐', '𛲙'), ('𛲜', '\u{1bca3}')];
 
 pub const EGYPTIAN_HIEROGLYPHS: &'static [(char, char)] =
     &[('𓀀', '𓐮'), ('\u{13430}', '\u{13438}')];
@@ -852,12 +836,8 @@ pub const INSCRIPTIONAL_PARTHIAN: &'static [(char, char)] =
 pub const JAVANESE: &'static [(char, char)] =
     &[('\u{a980}', '꧍'), ('ꧏ', '꧙'), ('꧞', '꧟')];
 
-pub const KAITHI: &'static [(char, char)] = &[
-    ('०', '९'),
-    ('꠰', '꠹'),
-    ('\u{11080}', '𑃁'),
-    ('\u{110cd}', '\u{110cd}'),
-];
+pub const KAITHI: &'static [(char, char)] =
+    &[('०', '९'), ('꠰', '꠹'), ('\u{11080}', '𑃁'), ('\u{110cd}', '\u{110cd}')];
 
 pub const KANNADA: &'static [(char, char)] = &[
     ('\u{951}', '\u{952}'),
@@ -1011,8 +991,7 @@ pub const LISU: &'static [(char, char)] = &[('ꓐ', '꓿')];
 
 pub const LYCIAN: &'static [(char, char)] = &[('𐊀', '𐊜')];
 
-pub const LYDIAN: &'static [(char, char)] =
-    &[('𐤠', '𐤹'), ('𐤿', '𐤿')];
+pub const LYDIAN: &'static [(char, char)] = &[('𐤠', '𐤹'), ('𐤿', '𐤿')];
 
 pub const MAHAJANI: &'static [(char, char)] =
     &[('।', '९'), ('꠰', '꠹'), ('𑅐', '𑅶')];
@@ -1067,11 +1046,8 @@ pub const MEROITIC_CURSIVE: &'static [(char, char)] =
 
 pub const MEROITIC_HIEROGLYPHS: &'static [(char, char)] = &[('𐦀', '𐦟')];
 
-pub const MIAO: &'static [(char, char)] = &[
-    ('𖼀', '\u{16f4a}'),
-    ('\u{16f4f}', '\u{16f87}'),
-    ('\u{16f8f}', '𖾟'),
-];
+pub const MIAO: &'static [(char, char)] =
+    &[('𖼀', '\u{16f4a}'), ('\u{16f4f}', '\u{16f87}'), ('\u{16f8f}', '𖾟')];
 
 pub const MODI: &'static [(char, char)] =
     &[('꠰', '꠹'), ('𑘀', '𑙄'), ('𑙐', '𑙙')];
@@ -1085,23 +1061,15 @@ pub const MONGOLIAN: &'static [(char, char)] = &[
     ('𑙠', '𑙬'),
 ];
 
-pub const MRO: &'static [(char, char)] =
-    &[('𖩀', '𖩞'), ('𖩠', '𖩩'), ('𖩮', '𖩯')];
+pub const MRO: &'static [(char, char)] = &[('𖩀', '𖩞'), ('𖩠', '𖩩'), ('𖩮', '𖩯')];
 
-pub const MULTANI: &'static [(char, char)] = &[
-    ('੦', '੯'),
-    ('𑊀', '𑊆'),
-    ('𑊈', '𑊈'),
-    ('𑊊', '𑊍'),
-    ('𑊏', '𑊝'),
-    ('𑊟', '𑊩'),
-];
+pub const MULTANI: &'static [(char, char)] =
+    &[('੦', '੯'), ('𑊀', '𑊆'), ('𑊈', '𑊈'), ('𑊊', '𑊍'), ('𑊏', '𑊝'), ('𑊟', '𑊩')];
 
 pub const MYANMAR: &'static [(char, char)] =
     &[('က', '႟'), ('꤮', '꤮'), ('ꧠ', 'ꧾ'), ('ꩠ', 'ꩿ')];
 
-pub const NABATAEAN: &'static [(char, char)] =
-    &[('𐢀', '𐢞'), ('𐢧', '𐢯')];
+pub const NABATAEAN: &'static [(char, char)] = &[('𐢀', '𐢞'), ('𐢧', '𐢯')];
 
 pub const NANDINAGARI: &'static [(char, char)] = &[
     ('।', '॥'),
@@ -1123,8 +1091,7 @@ pub const NEWA: &'static [(char, char)] =
 
 pub const NKO: &'static [(char, char)] = &[('߀', 'ߺ'), ('\u{7fd}', '߿')];
 
-pub const NUSHU: &'static [(char, char)] =
-    &[('𖿡', '𖿡'), ('𛅰', '𛋻')];
+pub const NUSHU: &'static [(char, char)] = &[('𖿡', '𖿡'), ('𛅰', '𛋻')];
 
 pub const NYIAKENG_PUACHUE_HMONG: &'static [(char, char)] = &[
     ('\u{1e100}', '\u{1e12c}'),
@@ -1140,16 +1107,14 @@ pub const OL_CHIKI: &'static [(char, char)] = &[('᱐', '᱿')];
 pub const OLD_HUNGARIAN: &'static [(char, char)] =
     &[('𐲀', '𐲲'), ('𐳀', '𐳲'), ('𐳺', '𐳿')];
 
-pub const OLD_ITALIC: &'static [(char, char)] =
-    &[('𐌀', '𐌣'), ('𐌭', '𐌯')];
+pub const OLD_ITALIC: &'static [(char, char)] = &[('𐌀', '𐌣'), ('𐌭', '𐌯')];
 
 pub const OLD_NORTH_ARABIAN: &'static [(char, char)] = &[('𐪀', '𐪟')];
 
 pub const OLD_PERMIC: &'static [(char, char)] =
     &[('\u{483}', '\u{483}'), ('𐍐', '\u{1037a}')];
 
-pub const OLD_PERSIAN: &'static [(char, char)] =
-    &[('𐎠', '𐏃'), ('𐏈', '𐏕')];
+pub const OLD_PERSIAN: &'static [(char, char)] = &[('𐎠', '𐏃'), ('𐏈', '𐏕')];
 
 pub const OLD_SOGDIAN: &'static [(char, char)] = &[('𐼀', '𐼧')];
 
@@ -1178,19 +1143,12 @@ pub const ORIYA: &'static [(char, char)] = &[
     ('ᳲ', 'ᳲ'),
 ];
 
-pub const OSAGE: &'static [(char, char)] =
-    &[('𐒰', '𐓓'), ('𐓘', '𐓻')];
+pub const OSAGE: &'static [(char, char)] = &[('𐒰', '𐓓'), ('𐓘', '𐓻')];
 
-pub const OSMANYA: &'static [(char, char)] =
-    &[('𐒀', '𐒝'), ('𐒠', '𐒩')];
+pub const OSMANYA: &'static [(char, char)] = &[('𐒀', '𐒝'), ('𐒠', '𐒩')];
 
-pub const PAHAWH_HMONG: &'static [(char, char)] = &[
-    ('𖬀', '𖭅'),
-    ('𖭐', '𖭙'),
-    ('𖭛', '𖭡'),
-    ('𖭣', '𖭷'),
-    ('𖭽', '𖮏'),
-];
+pub const PAHAWH_HMONG: &'static [(char, char)] =
+    &[('𖬀', '𖭅'), ('𖭐', '𖭙'), ('𖭛', '𖭡'), ('𖭣', '𖭷'), ('𖭽', '𖮏')];
 
 pub const PALMYRENE: &'static [(char, char)] = &[('𐡠', '𐡿')];
 
@@ -1199,8 +1157,7 @@ pub const PAU_CIN_HAU: &'static [(char, char)] = &[('𑫀', '𑫸')];
 pub const PHAGS_PA: &'static [(char, char)] =
     &[('᠂', '᠃'), ('᠅', '᠅'), ('ꡀ', '꡷')];
 
-pub const PHOENICIAN: &'static [(char, char)] =
-    &[('𐤀', '𐤛'), ('𐤟', '𐤟')];
+pub const PHOENICIAN: &'static [(char, char)] = &[('𐤀', '𐤛'), ('𐤟', '𐤟')];
 
 pub const PSALTER_PAHLAVI: &'static [(char, char)] =
     &[('ـ', 'ـ'), ('𐮀', '𐮑'), ('𐮙', '𐮜'), ('𐮩', '𐮯')];
@@ -1209,8 +1166,7 @@ pub const REJANG: &'static [(char, char)] = &[('ꤰ', '꥓'), ('꥟', '꥟')];
 
 pub const RUNIC: &'static [(char, char)] = &[('ᚠ', 'ᛪ'), ('ᛮ', 'ᛸ')];
 
-pub const SAMARITAN: &'static [(char, char)] =
-    &[('ࠀ', '\u{82d}'), ('࠰', '࠾')];
+pub const SAMARITAN: &'static [(char, char)] = &[('ࠀ', '\u{82d}'), ('࠰', '࠾')];
 
 pub const SAURASHTRA: &'static [(char, char)] =
     &[('ꢀ', '\u{a8c5}'), ('꣎', '꣙')];
@@ -1230,11 +1186,8 @@ pub const SHAVIAN: &'static [(char, char)] = &[('𐑐', '𐑿')];
 pub const SIDDHAM: &'static [(char, char)] =
     &[('𑖀', '\u{115b5}'), ('𑖸', '\u{115dd}')];
 
-pub const SIGNWRITING: &'static [(char, char)] = &[
-    ('𝠀', '𝪋'),
-    ('\u{1da9b}', '\u{1da9f}'),
-    ('\u{1daa1}', '\u{1daaf}'),
-];
+pub const SIGNWRITING: &'static [(char, char)] =
+    &[('𝠀', '𝪋'), ('\u{1da9b}', '\u{1da9f}'), ('\u{1daa1}', '\u{1daaf}')];
 
 pub const SINHALA: &'static [(char, char)] = &[
     ('।', '॥'),
@@ -1255,8 +1208,7 @@ pub const SINHALA: &'static [(char, char)] = &[
 
 pub const SOGDIAN: &'static [(char, char)] = &[('ـ', 'ـ'), ('𐼰', '𐽙')];
 
-pub const SORA_SOMPENG: &'static [(char, char)] =
-    &[('𑃐', '𑃨'), ('𑃰', '𑃹')];
+pub const SORA_SOMPENG: &'static [(char, char)] = &[('𑃐', '𑃨'), ('𑃰', '𑃹')];
 
 pub const SOYOMBO: &'static [(char, char)] = &[('𑩐', '𑪢')];
 
@@ -1282,12 +1234,8 @@ pub const SYRIAC: &'static [(char, char)] = &[
 pub const TAGALOG: &'static [(char, char)] =
     &[('ᜀ', 'ᜌ'), ('ᜎ', '\u{1714}'), ('᜵', '᜶')];
 
-pub const TAGBANWA: &'static [(char, char)] = &[
-    ('᜵', '᜶'),
-    ('ᝠ', 'ᝬ'),
-    ('ᝮ', 'ᝰ'),
-    ('\u{1772}', '\u{1773}'),
-];
+pub const TAGBANWA: &'static [(char, char)] =
+    &[('᜵', '᜶'), ('ᝠ', 'ᝬ'), ('ᝮ', 'ᝰ'), ('\u{1772}', '\u{1773}')];
 
 pub const TAI_LE: &'static [(char, char)] =
     &[('၀', '၉'), ('ᥐ', 'ᥭ'), ('ᥰ', 'ᥴ')];
@@ -1300,8 +1248,7 @@ pub const TAI_THAM: &'static [(char, char)] = &[
     ('᪠', '᪭'),
 ];
 
-pub const TAI_VIET: &'static [(char, char)] =
-    &[('ꪀ', 'ꫂ'), ('ꫛ', '꫟')];
+pub const TAI_VIET: &'static [(char, char)] = &[('ꪀ', 'ꫂ'), ('ꫛ', '꫟')];
 
 pub const TAKRI: &'static [(char, char)] =
     &[('।', '॥'), ('꠰', '꠹'), ('𑚀', '\u{116b8}'), ('𑛀', '𑛉')];
@@ -1366,8 +1313,7 @@ pub const THAANA: &'static [(char, char)] = &[
     ('﷽', '﷽'),
 ];
 
-pub const THAI: &'static [(char, char)] =
-    &[('ก', '\u{e3a}'), ('เ', '๛')];
+pub const THAI: &'static [(char, char)] = &[('ก', '\u{e3a}'), ('เ', '๛')];
 
 pub const TIBETAN: &'static [(char, char)] = &[
     ('ༀ', 'ཇ'),
@@ -1391,16 +1337,14 @@ pub const TIRHUTA: &'static [(char, char)] = &[
     ('𑓐', '𑓙'),
 ];
 
-pub const UGARITIC: &'static [(char, char)] =
-    &[('𐎀', '𐎝'), ('𐎟', '𐎟')];
+pub const UGARITIC: &'static [(char, char)] = &[('𐎀', '𐎝'), ('𐎟', '𐎟')];
 
 pub const VAI: &'static [(char, char)] = &[('ꔀ', 'ꘫ')];
 
 pub const WANCHO: &'static [(char, char)] =
     &[('\u{1e2c0}', '\u{1e2f9}'), ('\u{1e2ff}', '\u{1e2ff}')];
 
-pub const WARANG_CITI: &'static [(char, char)] =
-    &[('𑢠', '𑣲'), ('𑣿', '𑣿')];
+pub const WARANG_CITI: &'static [(char, char)] = &[('𑢠', '𑣲'), ('𑣿', '𑣿')];
 
 pub const YI: &'static [(char, char)] = &[
     ('、', '。'),
diff --git a/src/error.rs b/src/error.rs
index eb7f121a83..23d4b342a3 100644
--- a/src/error.rs
+++ b/src/error.rs
@@ -18,15 +18,7 @@ pub enum Error {
     __Nonexhaustive,
 }
 
-impl ::std::error::Error for Error {
-    fn description(&self) -> &str {
-        match *self {
-            Error::Syntax(ref err) => err,
-            Error::CompiledTooBig(_) => "compiled program too big",
-            Error::__Nonexhaustive => unreachable!(),
-        }
-    }
-}
+impl ::std::error::Error for Error {}
 
 impl fmt::Display for Error {
     fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
diff --git a/tests/bytes.rs b/tests/bytes.rs
index 6c5a11ac77..d05f138edf 100644
--- a/tests/bytes.rs
+++ b/tests/bytes.rs
@@ -69,10 +69,12 @@ matiter!(
     R(b"\x8d#;\x1a\xa4s3\x05foobarX\\\x0f0t\xe4\x9b\xa4"),
     (0, 0)
 );
-matiter!(invalidutf8_anchor2,
-         r"(?-u)^\xf7|4\xff\d\x8a\x8a\x8a\x8a\x8a\x8a\x8a\x8a\x8a\x8a\x8a\x8a\x8a##########[] d\x8a\x8a\x8a\x8a\x8a\x8a\x8a\x8a\x8a\x8a\x8a\x8a\x8a##########\[] #####\x80\S7|$",
-         R(b"\x8d#;\x1a\xa4s3\x05foobarX\\\x0f0t\xe4\x9b\xa4"),
-         (22, 22));
+matiter!(
+    invalidutf8_anchor2,
+    r"(?-u)^\xf7|4\xff\d\x8a\x8a\x8a\x8a\x8a\x8a\x8a\x8a\x8a\x8a\x8a\x8a\x8a##########[] d\x8a\x8a\x8a\x8a\x8a\x8a\x8a\x8a\x8a\x8a\x8a\x8a\x8a##########\[] #####\x80\S7|$",
+    R(b"\x8d#;\x1a\xa4s3\x05foobarX\\\x0f0t\xe4\x9b\xa4"),
+    (22, 22)
+);
 matiter!(
     invalidutf8_anchor3,
     r"(?-u)^|ddp\xff\xffdddddlQd@\x80",
diff --git a/tests/consistent.rs b/tests/consistent.rs
index 2d7bdcf8d1..0f9ea53f35 100644
--- a/tests/consistent.rs
+++ b/tests/consistent.rs
@@ -231,7 +231,6 @@ macro_rules! checker {
                     TestResult::from_bool(true)
                 }
             }
-
         } // mod
     }; // rule case
 } // macro_rules!
diff --git a/tests/crazy.rs b/tests/crazy.rs
index 20a3371b2e..8c72273d93 100644
--- a/tests/crazy.rs
+++ b/tests/crazy.rs
@@ -29,8 +29,12 @@ mat!(
     "mine is jam.slam@gmail ",
     None
 );
-mat!(match_email_big, r"[a-z0-9!#$%&'*+/=?^_`{|}~-]+(?:\.[a-z0-9!#$%&'*+/=?^_`{|}~-]+)*@(?:[a-z0-9](?:[a-z0-9-]*[a-z0-9])?\.)+[a-z0-9](?:[a-z0-9-]*[a-z0-9])?",
-     "mine is jam.slam@gmail.com ", Some((8, 26)));
+mat!(
+    match_email_big,
+    r"[a-z0-9!#$%&'*+/=?^_`{|}~-]+(?:\.[a-z0-9!#$%&'*+/=?^_`{|}~-]+)*@(?:[a-z0-9](?:[a-z0-9-]*[a-z0-9])?\.)+[a-z0-9](?:[a-z0-9-]*[a-z0-9])?",
+    "mine is jam.slam@gmail.com ",
+    Some((8, 26))
+);
 mat!(
     match_date1,
     r"(?-u)^(19|20)\d\d[- /.](0[1-9]|1[012])[- /.](0[1-9]|[12][0-9]|3[01])$",
diff --git a/tests/fowler.rs b/tests/fowler.rs
index 5da32935e7..7f56a758d3 100644
--- a/tests/fowler.rs
+++ b/tests/fowler.rs
@@ -215,7 +215,13 @@ mat!(
     Some((1, 2)),
     Some((1, 2))
 );
-mat!(match_basic_76, r"a?(ab|ba)*", r"ababababababababababababababababababababababababababababababababababababababababa", Some((0, 81)), Some((79, 81)));
+mat!(
+    match_basic_76,
+    r"a?(ab|ba)*",
+    r"ababababababababababababababababababababababababababababababababababababababababa",
+    Some((0, 81)),
+    Some((79, 81))
+);
 mat!(
     match_basic_77,
     r"abaa|abbaa|abbbaa|abbbbaa",
diff --git a/tests/unicode.rs b/tests/unicode.rs
index 597f86873a..52522f41c6 100644
--- a/tests/unicode.rs
+++ b/tests/unicode.rs
@@ -60,12 +60,7 @@ mat!(
     "〰",
     Some((0, 3))
 );
-mat!(
-    uni_class_gencat_decimal_numer,
-    r"\p{Decimal_Number}",
-    "𑓙",
-    Some((0, 4))
-);
+mat!(uni_class_gencat_decimal_numer, r"\p{Decimal_Number}", "𑓙", Some((0, 4)));
 mat!(
     uni_class_gencat_enclosing_mark,
     r"\p{Enclosing_Mark}",
@@ -86,12 +81,7 @@ mat!(
     Some((0, 3))
 );
 mat!(uni_class_gencat_letter, r"\p{Letter}", "Έ", Some((0, 2)));
-mat!(
-    uni_class_gencat_letter_number,
-    r"\p{Letter_Number}",
-    "ↂ",
-    Some((0, 3))
-);
+mat!(uni_class_gencat_letter_number, r"\p{Letter_Number}", "ↂ", Some((0, 3)));
 mat!(
     uni_class_gencat_line_separator,
     r"\p{Line_Separator}",