F#: Regexp optimisation + don't use captures if not needed

components/prism-fsharp.js

@@ -11,14 +11,14 @@ Prism.languages.fsharp = Prism.languages.extend('clike', {
 	],
 	'keyword': /\b(?:let|return|use|yield)(?:!\B|\b)|\b(abstract|and|as|assert|base|begin|class|default|delegate|do|done|downcast|downto|elif|else|end|exception|extern|false|finally|for|fun|function|global|if|in|inherit|inline|interface|internal|lazy|match|member|module|mutable|namespace|new|not|null|of|open|or|override|private|public|rec|select|static|struct|then|to|true|try|type|upcast|val|void|when|while|with|asr|land|lor|lsl|lsr|lxor|mod|sig|atomic|break|checked|component|const|constraint|constructor|continue|eager|event|external|fixed|functor|include|method|mixin|object|parallel|process|protected|pure|sealed|tailcall|trait|virtual|volatile)\b/,
 	'string': {
-		pattern: /(?:"""[\s\S]*?"""|@"(?:""|[^"])*"|("|')(?:\\\1|\\?(?!\1)[\s\S])*\1)B?/,
+		pattern: /(?:"""[\s\S]*?"""|@"(?:""|[^"])*"|("|')(?:\\[\s\S]|(?!\1)[^\\])*\1)B?/,
 		greedy: true
 	},
 	'number': [
-		/\b-?0x[\da-fA-F]+(un|lf|LF)?\b/,
-		/\b-?0b[01]+(y|uy)?\b/,
-		/\b-?(\d*\.?\d+|\d+\.)([fFmM]|[eE][+-]?\d+)?\b/,
-		/\b-?\d+(y|uy|s|us|l|u|ul|L|UL|I)?\b/
+		/\b-?0x[\da-fA-F]+(?:un|lf|LF)?\b/,
+		/\b-?0b[01]+(?:y|uy)?\b/,
+		/\b-?(?:\d*\.?\d+|\d+\.)(?:[fFmM]|[eE][+-]?\d+)?\b/,
+		/\b-?\d+(?:y|uy|s|us|l|u|ul|L|UL|I)?\b/
 	]
 });
 Prism.languages.insertBefore('fsharp', 'keyword', {
@@ -27,7 +27,7 @@ Prism.languages.insertBefore('fsharp', 'keyword', {
 		alias: 'property',
 		inside: {
 			'directive': {
-				pattern: /(\s*#)\b(else|endif|if|light|line|nowarn)\b/,
+				pattern: /(\s*#)\b(?:else|endif|if|light|line|nowarn)\b/,
 				lookbehind: true,
 				alias: 'keyword'
 			}