Docs: Drop inline callouts from painless book (#40805)

Drops the inline callouts from the painless reference book. These
callouts are incompatible with Asciidoctor and we'd very much like to
switch to Asciidoctor for building this book, partially because
Asciidoctor is actively developed and AsciiDoc is not, and partially
because it builds the book three times faster.

Author: nik9000

docs/painless/painless-casting.asciidoc

@@ -28,9 +28,9 @@ cast: '(' TYPE ')' expression
 +
 [source,Painless]
 ----
-<1> int i = (int)5L;
-<2> Map m = new HashMap();
-<3> HashMap hm = (HashMap)m;
+int i = (int)5L;         <1>
+Map m = new HashMap();   <2>
+HashMap hm = (HashMap)m; <3>
 ----
 +
 <1> declare `int i`;
@@ -75,10 +75,10 @@ following table:
 +
 [source,Painless]
 ----
-<1> int a = 1;
-<2> long b = a;
-<3> short c = (short)b;
-<4> double e = (double)a;
+int a = 1;            <1>
+long b = a;           <2>
+short c = (short)b;   <3>
+double e = (double)a; <4>
 ----
 +
 <1> declare `int a`;
@@ -101,9 +101,9 @@ following table:
 +
 [source,Painless]
 ----
-<1> int a = 1.0; // error
-<2> int b = 2;
-<3> byte c = b;  // error
+int a = 1.0; // error <1>
+int b = 2;            <2>
+byte c = b;  // error <3>
 ----
 +
 <1> declare `int i`;
@@ -132,11 +132,11 @@ or the target type is a descendant of the original type.
 +
 [source,Painless]
 ----
-<1> List x;
-<2> ArrayList y = new ArrayList();
-<3> x = y;
-<4> y = (ArrayList)x;
-<5> x = (List)y;
+List x;                        <1>
+ArrayList y = new ArrayList(); <2>
+x = y;                         <3>
+y = (ArrayList)x;              <4>
+x = (List)y;                   <5>
 ----
 +
 <1> declare `List x`;
@@ -161,9 +161,9 @@ or the target type is a descendant of the original type.
 +
 [source,Painless]
 ----
-<1> List x = new ArrayList();
-<2> ArrayList y = x;          // error
-<3> Map m = (Map)x;           // error
+List x = new ArrayList();          <1>
+ArrayList y = x;          // error <2>
+Map m = (Map)x;           // error <3>
 ----
 +
 <1> declare `List x`;
@@ -201,11 +201,11 @@ based on the current type value the `def` type value represents.
 +
 [source,Painless]
 ----
-<1> def d0 = 3;
-<2> d0 = new ArrayList();
-<3> Object o = new HashMap();
-<4> def d1 = o;
-<5> int i = d1.size();
+def d0 = 3;               <1>
+d0 = new ArrayList();     <2>
+Object o = new HashMap(); <3>
+def d1 = o;               <4>
+int i = d1.size();        <5>
 ----
 +
 <1> declare `def d0`;
@@ -236,12 +236,12 @@ based on the current type value the `def` type value represents.
 +
 [source,Painless]
 ----
-<1> def d = 1.0;
-<2> int i = (int)d;
-<3> d = 1;
-<4> float f = d;
-<5> d = new ArrayList();
-<6> List l = d;
+def d = 1.0;         <1>
+int i = (int)d;      <2>
+d = 1;               <3>
+float f = d;         <4>
+d = new ArrayList(); <5>
+List l = d;          <6>
 ----
 +
 <1> declare `def d`;
@@ -274,10 +274,10 @@ based on the current type value the `def` type value represents.
 +
 [source,Painless]
 ----
-<1> def d = 1;
-<2> short s = d;       // error
-<3> d = new HashMap();
-<4> List l = d;        // error
+def d = 1;                  <1>
+short s = d;       // error <2>
+d = new HashMap();          <3>
+List l = d;        // error <4>
 ----
 <1> declare `def d`;
     implicit cast `int 1` to `def` -> `def`;
@@ -314,8 +314,8 @@ Use the cast operator to convert a <<string-type, `String` type>> value into a
 +
 [source,Painless]
 ----
-<1> char c = (char)"C";
-<2> c = (char)'c';
+char c = (char)"C"; <1>
+c = (char)'c';      <2>
 ----
 +
 <1> declare `char c`;
@@ -328,8 +328,8 @@ Use the cast operator to convert a <<string-type, `String` type>> value into a
 +
 [source,Painless]
 ----
-<1> String s = "s";
-<2> char c = (char)s;
+String s = "s";   <1>
+char c = (char)s; <2>
 ----
 <1> declare `String s`;
     store `String "s"` to `s`;
@@ -368,10 +368,10 @@ value and vice versa.
 +
 [source,Painless]
 ----
-<1> List l = new ArrayList();
-<2> l.add(1);
-<3> Integer I = Integer.valueOf(0);
-<4> int i = l.get(i);
+List l = new ArrayList();       <1>
+l.add(1);                       <2>
+Integer I = Integer.valueOf(0); <3>
+int i = l.get(i);               <4>
 ----
 +
 <1> declare `List l`;
@@ -399,10 +399,10 @@ value and vice versa.
 +
 [source,Painless]
 ----
-<1> Integer x = 1;                   // error
-<2> Integer y = (Integer)1;          // error
-<3> int a = Integer.valueOf(1);      // error
-<4> int b = (int)Integer.valueOf(1); // error
+Integer x = 1;                   // error <1>
+Integer y = (Integer)1;          // error <2>
+int a = Integer.valueOf(1);      // error <3>
+int b = (int)Integer.valueOf(1); // error <4>
 ----
 +
 <1> declare `Integer x`;
@@ -437,9 +437,9 @@ based on the type the `def` value represents.
 +
 [source,Painless]
 ----
-<1> double d = 2 + 2.0;
-<2> def x = 1;
-<3> float f = x + 2.0F;
+double d = 2 + 2.0; <1>
+def x = 1;          <2>
+float f = x + 2.0F; <3>
 ----
 <1> declare `double d`;
     promote `int 2` and `double 2.0 @0`: result `double`;

docs/painless/painless-literals.asciidoc

@@ -30,12 +30,12 @@ HEX:     '-'? '0' [xX] [0-9a-fA-F]+ [lL]?;
 +
 [source,Painless]
 ----
-<1> 0
-<2> 0D
-<3> 1234L
-<4> -90f
-<5> -022
-<6> 0xF2A
+0     <1>
+0D    <2>
+1234L <3>
+-90f  <4>
+-022  <5>
+0xF2A <6>
 ----
 +
 <1> `int 0`
@@ -67,11 +67,11 @@ EXPONENT: ( [eE] [+\-]? [0-9]+ );
 +
 [source,Painless]
 ----
-<1> 0.0
-<2> 1E6
-<3> 0.977777
-<4> -126.34
-<5> 89.9F
+0.0      <1>
+1E6      <2>
+0.977777 <3>
+-126.34  <4>
+89.9F    <5>
 ----
 +
 <1> `double 0.0`

docs/painless/painless-operators-array.asciidoc

@@ -29,7 +29,7 @@ expression_list: expression (',' expression);
 +
 [source,Painless]
 ----
-<1> int[] x = new int[] {1, 2, 3};
+int[] x = new int[] {1, 2, 3}; <1>
 ----
 +
 <1> declare `int[] x`;
@@ -44,12 +44,12 @@ expression_list: expression (',' expression);
 +
 [source,Painless]
 ----
-<1> int i = 1;
-<2> long l = 2L;
-<3> float f = 3.0F;
-<4> double d = 4.0;
-<5> String s = "5";
-<6> def array = new def[] {i, l, f*d, s};
+int i = 1;      <1>
+long l = 2L;    <2>
+float f = 3.0F; <3>
+double d = 4.0; <4>
+String s = "5"; <5>
+def array = new def[] {i, l, f*d, s}; <6>
 ----
 +
 <1> declare `int i`;
@@ -114,12 +114,12 @@ brace_access: '[' expression ']'
 +
 [source,Painless]
 ----
-<1> int[] x = new int[2];
-<2> x[0] = 2;
-<3> x[1] = 5;
-<4> int y = x[0] + x[1];
-<5> int z = 1;
-<6> int i = x[z];
+int[] x = new int[2]; <1>
+x[0] = 2;             <2>
+x[1] = 5;             <3>
+int y = x[0] + x[1];  <4>
+int z = 1;            <5>
+int i = x[z];         <6>
 ----
 +
 <1> declare `int[] x`;
@@ -149,12 +149,12 @@ brace_access: '[' expression ']'
 +
 [source,Painless]
 ----
-<1> def d = new int[2];
-<2> d[0] = 2;
-<3> d[1] = 5;
-<4> def x = d[0] + d[1];
-<5> def y = 1;
-<6> def z = d[y];
+def d = new int[2];  <1>
+d[0] = 2;            <2>
+d[1] = 5;            <3>
+def x = d[0] + d[1]; <4>
+def y = 1;           <5>
+def z = d[y];        <6>
 ----
 +
 <1> declare `def d`;
@@ -199,9 +199,9 @@ brace_access: '[' expression ']'
 +
 [source,Painless]
 ----
-<1> int[][][] ia3 = new int[2][3][4];
-<2> ia3[1][2][3] = 99;
-<3> int i = ia3[1][2][3];
+int[][][] ia3 = new int[2][3][4]; <1>
+ia3[1][2][3] = 99;                <2>
+int i = ia3[1][2][3];             <3>
 ----
 +
 <1> declare `int[][][] ia`;
@@ -230,8 +230,8 @@ from an array type value.
 +
 [source,Painless]
 ----
-<1> int[] x = new int[10];
-<2> int l = x.length;
+int[] x = new int[10]; <1>
+int l = x.length;      <2>
 ----
 <1> declare `int[] x`;
     allocate `1-d int array` instance with `length [2]`
@@ -269,10 +269,10 @@ new_array: 'new' TYPE ('[' expression ']')+;
 +
 [source,Painless]
 ----
-<1> int[] x = new int[5];
-<2> x = new int[10];
-<3> int y = 2;
-<4> def z = new def[y][y*2];
+int[] x = new int[5];    <1>
+x = new int[10];         <2>
+int y = 2;               <3>
+def z = new def[y][y*2]; <4>
 ----
 +
 <1> declare `int[] x`;