Fix character brackets behave like normal code (#127)

Author: yikerman

syntaxes/racket.tmLanguage.json

@@ -1474,7 +1474,7 @@
     "character": {
       "patterns": [
         {
-          "name": "constant.character.racket",
+          "name": "string.quoted.single.racket",
           "match": "(?x) \\#\\\\\n  (?:\n    (?: [0-7]{3}) |\n    (?: u[0-9a-fA-F]{1,4}) |\n    (?: U[0-9a-fA-F]{1,6}) |\n    (?:\n      (?:\n        null? | newline | linefeed | backspace | vtab | page |\n        return | space | rubout | (?: [^\\w\\s] | \\d)\n      )\n      (?![a-zA-Z])\n    ) |\n    (?: [^\\W\\d](?=[\\W\\d]) | \\W )\n  )\n"
         }
       ]

syntaxes/src/racket.yaml

@@ -1155,7 +1155,7 @@ repository:
 
   character:
     patterns:
-      - name: constant.character.racket
+      - name: string.quoted.single.racket
         match: |
           (?x) \#\\
             (?: