bug fix within do_add_range: 1. use tokenise to get the toks; 2: handle attributs without arguments.
bug fix within do_add_range: 1. use tokenise to get the toks; 2: handle attributs without arguments.

prowessproject/wrangler,arcusfelis/wrangler,bsmr-erlang/wrangler,andrzejsliwa/wrangler,arcusfelis/wrangler,tdb/wrangler