Allow for empty strings

grammar.js

@@ -29,11 +29,11 @@ module.exports = grammar({
 			"`"
 		),
 
-		code_contents: $ => /[^`]+/,
+		code_contents: $ => /[^`]*/,
 
-		double_contents: $ => /[^"]+/,
+		double_contents: $ => /[^"]*/,
 
-		single_contents: $ => /[^']+/,
+		single_contents: $ => /[^']*/,
 
 		number: $ => seq(optional("-"), /[0-9]+/, optional(seq(".", repeat(/[0-9]/)))),
 		boolean: $ => choice($.true, $.false),

src/grammar.json

@@ -66,15 +66,15 @@
     },
     "code_contents": {
       "type": "PATTERN",
-      "value": "[^`]+"
+      "value": "[^`]*"
     },
     "double_contents": {
       "type": "PATTERN",
-      "value": "[^\"]+"
+      "value": "[^\"]*"
     },
     "single_contents": {
       "type": "PATTERN",
-      "value": "[^']+"
+      "value": "[^']*"
     },
     "number": {
       "type": "SEQ",