Reformat whitespace list for consistency

Author: ehuss

src/whitespace.md

@@ -4,26 +4,23 @@ r[lex.whitespace]
 r[whitespace.syntax]
 ```grammar,lexer
 @root WHITESPACE ->
-    // end of line
-      LF
-    | U+000B // vertical tabulation
-    | U+000C // form feed
-    | CR
-    | U+0085 // Unicode next line
-    | U+2028 // Unicode LINE SEPARATOR
-    | U+2029 // Unicode PARAGRAPH SEPARATOR
-    // Ignorable Code Point
-    | U+200E // Unicode LEFT-TO-RIGHT MARK
-    | U+200F // Unicode RIGHT-TO-LEFT MARK
-    // horizontal whitespace
-    | TAB
-    | U+0020  // space ' '
-
-TAB -> U+0009  // horizontal tab ('\t')
-
-LF -> U+000A  // line feed ('\n')
-
-CR -> U+000D  // carriage return ('\r')
+      U+0009 // Horizontal tab, `'\t'`
+    | U+000A // Line feed, `'\n'`
+    | U+000B // Vertical tab
+    | U+000C // Form feed
+    | U+000D // Carriage return, `'\r'`
+    | U+0020 // Space, `' '`
+    | U+0085 // Next line
+    | U+200E // Left-to-right mark
+    | U+200F // Right-to-left mark
+    | U+2028 // Line separator
+    | U+2029 // Paragraph separator
+
+TAB -> U+0009 // Horizontal tab, `'\t'`
+
+LF -> U+000A  // Line feed, `'\n'`
+
+CR -> U+000D  // Carriage return, `'\r'`
 ```
 
 r[lex.whitespace.intro]