refactor(comment): Improve logic readability

Author: pan93412

Diff for: src/comment.rs

@@ -364,24 +364,34 @@ fn identify_comment(
     let (first_group, rest) = orig.split_at(first_group_ending);
 
     let is_doc_comment_with_our_determination = is_doc_comment || style.is_doc_comment();
-    let rewritten_first_group =
-        if !config.normalize_comments() && has_bare_lines && style.is_block_comment() {
-            trim_left_preserve_layout(first_group, shape.indent, config)?
-        } else if !config.normalize_comments()
-            && !config.wrap_comments()
-            && (!config.format_code_in_doc_comments() || !is_doc_comment_with_our_determination)
-        {
-            light_rewrite_comment(first_group, shape.indent, config, is_doc_comment)
-        } else {
-            rewrite_comment_inner(
-                first_group,
-                block_style,
-                style,
-                shape,
-                config,
-                is_doc_comment_with_our_determination,
-            )?
-        };
+
+    let should_trim_left_preserve_layout =
+        { !config.normalize_comments() && has_bare_lines && style.is_block_comment() };
+
+    let should_not_just_lightly_rewrite_comment = {
+        config.normalize_comments()
+            || config.wrap_comments()
+            || (
+                // `format_code_in_doc_comments` should only take effect on doc comments,
+                // so we only consider it when this comment block is a doc comment block.
+                is_doc_comment_with_our_determination && config.format_code_in_doc_comments()
+            )
+    };
+
+    let rewritten_first_group = if should_trim_left_preserve_layout {
+        trim_left_preserve_layout(first_group, shape.indent, config)?
+    } else if !should_not_just_lightly_rewrite_comment {
+        light_rewrite_comment(first_group, shape.indent, config, is_doc_comment)
+    } else {
+        rewrite_comment_inner(
+            first_group,
+            block_style,
+            style,
+            shape,
+            config,
+            is_doc_comment_with_our_determination,
+        )?
+    };
     if rest.is_empty() {
         Some(rewritten_first_group)
     } else {