Add #\tab to character constants

Author: jryans

syntaxes/racket.tmLanguage.json

@@ -1475,7 +1475,7 @@
       "patterns": [
         {
           "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"
+          "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 | v?tab | 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

@@ -1164,7 +1164,7 @@ repository:
               (?: U[0-9a-fA-F]{1,6}) |
               (?:
                 (?:
-                  null? | newline | linefeed | backspace | vtab | page |
+                  null? | newline | linefeed | backspace | v?tab | page |
                   return | space | rubout | (?: [^\w\s] | \d)
                 )
                 (?![a-zA-Z])