gruntjs/grunt-contrib-concat — pull request #103 by mzgoddard (2014-09-25 04:38:27+00:00)
Title: Tokenize dummy source map on words and new lines.

@Toilal, in #96, brought up a good point that improves line numbers
mapping. This takes that into consideration by improving the regex to
create newlines as separate tokens. It also makes tokens from white
space, letting non word characters be tokenized if they are surrounded
by whitespace.