Merged PR 472925: Update Razor textmate grammar

Pulled from dotnet/razor main to bring across a recent fix

Author: davidwengier

src/razor/syntaxes/aspnetcorerazor.tmLanguage.json

@@ -529,7 +529,7 @@
       ]
     },
     "code-directive": {
-      "begin": "(@)(code)\\s*",
+      "begin": "(@)(code)((?=\\{)|\\s+)",
       "beginCaptures": {
         "1": {
           "patterns": [
@@ -550,7 +550,7 @@
       "end": "(?<=})|\\s"
     },
     "functions-directive": {
-      "begin": "(@)(functions)\\s*",
+      "begin": "(@)(functions)((?=\\{)|\\s+)",
       "beginCaptures": {
         "1": {
           "patterns": [
@@ -1809,4 +1809,4 @@
       }
     }
   }
-}
+}