Merge pull request #64007 from DustinCampbell/update-csharp-grammar

Update C# TextMate grammar with latest fixes

extensions/csharp/cgmanifest.json

@@ -6,7 +6,7 @@
 				"git": {
 					"name": "dotnet/csharp-tmLanguage",
 					"repositoryUrl": "https://github.com/dotnet/csharp-tmLanguage",
-					"commitHash": "b95e4044ff1ac52e03f622de76f459dc5388954c"
+					"commitHash": "ad7514e8d78542a6ee37f6187091cd4102eb3797"
 				}
 			},
 			"license": "MIT",

extensions/csharp/syntaxes/csharp.tmLanguage.json

@@ -4,7 +4,7 @@
 		"If you want to provide a fix or improvement, please create a pull request against the original repository.",
 		"Once accepted there, we are happy to receive an update request."
 	],
-	"version": "https://github.com/dotnet/csharp-tmLanguage/commit/b95e4044ff1ac52e03f622de76f459dc5388954c",
+	"version": "https://github.com/dotnet/csharp-tmLanguage/commit/ad7514e8d78542a6ee37f6187091cd4102eb3797",
 	"name": "C#",
 	"scopeName": "source.cs",
 	"patterns": [
@@ -2150,7 +2150,7 @@
 			]
 		},
 		"local-variable-declaration": {
-			"begin": "(?x)\n(?:\n  (?:(\\bref)\\s+(?:(\\breadonly)\\s+)?)?(\\bvar\\b)| # ref local\n  (?<type-name>\n    (?:\n      (?:ref\\s+(?:readonly\\s+)?)?   # ref local\n      (?:\n        (?:(?<identifier>@?[_[:alpha:]][_[:alnum:]]*)\\s*\\:\\:\\s*)? # alias-qualification\n        (?<name-and-type-args> # identifier + type arguments (if any)\n          \\g<identifier>\\s*\n          (?<type-args>\\s*<(?:[^<>]|\\g<type-args>)+>\\s*)?\n        )\n        (?:\\s*\\.\\s*\\g<name-and-type-args>)* | # Are there any more names being dotted into?\n        (?<tuple>\\s*\\((?:[^\\(\\)]|\\g<tuple>)+\\))\n      )\n      (?:\\s*\\?\\s*)? # nullable suffix?\n      (?:\\s*\\[(?:\\s*,\\s*)*\\]\\s*)* # array suffix?\n    )\n  )\n)\\s+\n(\\g<identifier>)\\s*\n(?=,|;|=|\\))",
+			"begin": "(?x)\n(?:\n  (?:(\\bref)\\s+(?:(\\breadonly)\\s+)?)?(\\bvar\\b)| # ref local\n  (?<type-name>\n    (?:\n      (?:ref\\s+(?:readonly\\s+)?)?   # ref local\n      (?:\n        (?:(?<identifier>@?[_[:alpha:]][_[:alnum:]]*)\\s*\\:\\:\\s*)? # alias-qualification\n        (?<name-and-type-args> # identifier + type arguments (if any)\n          \\g<identifier>\\s*\n          (?<type-args>\\s*<(?:[^<>]|\\g<type-args>)+>\\s*)?\n        )\n        (?:\\s*\\.\\s*\\g<name-and-type-args>)* | # Are there any more names being dotted into?\n        (?<tuple>\\s*\\((?:[^\\(\\)]|\\g<tuple>)+\\))\n      )\n      (?:\\s*\\?\\s*)? # nullable suffix?\n      (?:\\s*\\[(?:\\s*,\\s*)*\\]\\s*)* # array suffix?\n    )\n  )\n)\\s+\n(\\g<identifier>)\\s*\n(?!=>)\n(?=,|;|=|\\))",
 			"beginCaptures": {
 				"1": {
 					"name": "storage.modifier.cs"