Fix characters being absorbed with keyword.operator and keword.operator.assignment

Author: johnsbrew

grammars/scala.cson

@@ -458,13 +458,13 @@
         'captures':
           '2':
             'name': 'keyword.operator.scala'
-        'match': '([^!#%&*+\-/:<=>?@\\\\^|~_])(<-|←|->|→|=>|⇒|\\?|\\:+|@|\\|)+([^!#%&*+\-/:<=>?@\\\\^|~])'
+        'match': '([^!#%&*+\-/:<=>?@\\\\^|~_])(<-|←|->|→|=>|⇒|\\?|\\:+|@|\\|)+(?=[^!#%&*+\-/:<=>?@\\\\^|~])'
       }
       {
         'captures':
           '2':
             'name': 'keyword.operator.assignment.scala'
-        'match': '([^!#%&*+\-/:<=>?@\\\\^|~_])(=)([^!#%&*+\-/:<=>?@\\\\^|~])'
+        'match': '([^!#%&*+\-/:<=>?@\\\\^|~_])(=)(?=[^!#%&*+\-/:<=>?@\\\\^|~])'
       }
     ]
   'meta-brackets':