shelltest: die if 'cd ~' can't handle spaces in $HOME.
shelltest: die if 'cd ~' can't handle spaces in $HOME.

This fails on ash, dash, and busybox sh (for now).  But it's kind of
important since $HOME often has spaces on Win32.  I hope dash will be fixed
relatively soon.

I downgraded it to a warning since on Unix, this probably isn't a problem.

rowhit/redo,dinkelk/redo-python,rowhit/redo,rowhit/redo,apenwarr/redo,apenwarr/redo,pombredanne/redo,apenwarr/redo,dinkelk/redo-python,dinkelk/redo-python,apenwarr/redo,pombredanne/redo,pombredanne/redo,dinkelk/redo-python,rowhit/redo,pombredanne/redo