Update modeline patterns to use github-linguist/linguist#5271

CHANGELOG.md

@@ -6,6 +6,13 @@ This project honours [Semantic Versioning](http://semver.org).
 [Staged]: https://github.com/Alhadis/language-webassembly/compare/v1.1.1...HEAD
 
 
+[Staged]
+------------------------------------------------------------------------
+* __Fixed:__ [Various inaccuracies][1] related to modeline recognition
+
+[1]: https://github.com/github/linguist/pull/5271
+
+
 [v1.1.1]
 ------------------------------------------------------------------------
 **December 20th, 2019**  

grammars/webassembly.cson

@@ -8,16 +8,18 @@ firstLineMatch: """(?x)
 	(?:$|\\s)
 	|
 	# Modeline
-	(?i:
+	(?:
 		# Emacs
-		-\\*-(?:\\s*(?=[^:;\\s]+\\s*-\\*-)|(?:.*?[;\\s]|(?<=-\\*-))mode\\s*:\\s*)
-			(?:wasm|wast|web[\\s-]?assembly)
-		(?=[\\s;]|(?<![-*])-\\*-).*?-\\*-
+		-\\*-(?i:[ \\t]*(?=[^:;\\s]+[ \\t]*-\\*-)|(?:.*?[ \\t;]|(?<=-\\*-))[ \\t]*mode[ \\t]*:[ \\t]*)
+			(?i:wasm|was?t|web[-_]?assembly)
+		(?=[ \\t;]|(?<![-*])-\\*-).*?-\\*-
 		|
 		# Vim
-		(?:(?:\\s|^)vi(?:m[<=>]?\\d+|m)?|\\sex)(?=:(?=\\s*set?\\s[^\\n:]+:)|:(?!\\s*set?\\s))(?:(?:\\s|\\s*:\\s*)\\w*(?:\\s*=(?:[^\\n\\\\\\s]|\\\\.)*)?)*[\\s:](?:filetype|ft|syntax)\\s*=
-			(?:wasm|wast|web[\\s-]?assembly)
-		(?=\\s|:|$)
+		(?:(?:^|[ \\t])(?:vi|Vi(?=m))(?:m[<=>]?[0-9]+|m)?|[ \\t]ex)(?=:(?=[ \\t]*set?[ \\t][^\\r\\n:]+:)|:(?![ \\t]*set?[ \\t]))
+		(?:(?:[ \\t]*:[ \\t]*|[ \\t])\\w*(?:[ \\t]*=(?:[^\\\\\\s]|\\\\.)*)?)*[ \\t:]
+		(?:filetype|ft|syntax)[ \\t]*=
+			(?i:wasm|was?t|web[-_]?assembly)
+		(?=$|\\s|:)
 	)
 """
 patterns: [{