bo0ts/expand-region.el — comment on commit 83644ffdee46786bdc3db0d54be286493b3c1e95
File:  line 0
By magnars:

Ah, yes. I understand better now.

I think expand-region should be well-behaved in that it should never get stuck. But I don't think it should say that white space is never significant. In that case, I think each individual expansion method needs to play well with others.