Merge pull request #2122 from ehuss/fix-reserved-raw-ident

Fix ambiguity of RESERVED_RAW_IDENTIFIER

Author: traviscross

src/identifiers.md

@@ -15,7 +15,8 @@ NON_KEYWORD_IDENTIFIER -> IDENTIFIER_OR_KEYWORD _except a [strict][lex.keywords.
 
 IDENTIFIER -> NON_KEYWORD_IDENTIFIER | RAW_IDENTIFIER
 
-RESERVED_RAW_IDENTIFIER -> `r#` (`_` | `crate` | `self` | `Self` | `super`)
+RESERVED_RAW_IDENTIFIER ->
+    `r#` (`_` | `crate` | `self` | `Self` | `super`) _not immediately followed by XID_Continue_
 ```
 
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