     'repository' : [
       'escaped-char' :
         'name' : 'constant.character.escape'
-        'matches' : '\\\\(a|b|t|n|r|u[0-9a-zA-F]+;|.)'
+        'matches' : '\\\\([^u\(]|u[0-9a-zA-F]+;)'
     ]
   }
 ]

  }
  {
    'begin': '\''
    'end': '\''
    'contentName': 'string.quoted.single.lo'
    'patterns': [
        'include' : '#escaped-char'

  }
  {
    'begin': '\`'
    'end': '[^\\\\]?\`'
    'contentName': 'regexp.lo'
    'patterns': [
        'include' : '#escaped-char'
