update js highlighter test

lib/ace/mode/_test/text_javascript.txt

@@ -10,7 +10,7 @@ a/=b/c
 //test tokenize reg exps
 a=/b/g
 a+/b/g
-a = 1 + /2 + 1/b
+a = 1 + /2 + 1/gimyxk
 a=/a/ / /a/
 case /a/.test(c)
 //test tokenize multi-line comment containing a single line comment

lib/ace/mode/_test/tokens_javascript.json

@@ -96,7 +96,8 @@
   ["text"," "],
   ["string.regexp","/2 "],
   ["constant.language.escape","+"],
-  ["string.regexp"," 1/b"]
+  ["string.regexp"," 1/gimyx"],
+  ["identifier","k"]
 ],[
    "no_regex",
   ["identifier","a"],