Highlight function invoke

[gildorwang]

CoffeeScript makes it easy to chain function invokes by using spaces instead of parentheses. However it sometimes produces code like

action = (token, i) ->
  @tokens.splice i, 0, @generate 'CALL_END', ')', token[2]

which took me a second to realize there are actually two function invokes on the 2nd line. One is splice; the other is generate. It would be much easier to read if we can have all function invokes highlighted.