Text expansion bug + escaped characters = bad path

[GoogleCodeExporter]

Reproduce via the following steps via either web or none web interface
It appears that if there are escaped characters in a path, plush won't expand 
special characters like "~"

"cd"
"mkdir hello\ world"
"touch hello\ world/foo.txt"
"cat ~/hello\ world/foo.txt" -> File does not exist
"cat hello\ world/foo.txt" -> Succeeds

I'm building at commit 9eef15a32964692f97da146bff7d9d5dcf21622c

Original issue reported on code.google.com by zman...@gmail.com on 27 Jul 2013 at 5:03