"sage -hg" does not handle quoting correctly

[cwitty]

If you use "sage -hg" with arguments containing spaces, like:

  sage -hg commit -m "This is my great new code."

then the argument gets split up, so Mercurial sees something more like

  hg commit -m This is my great new code.

(and tries to check in files named is,my,great,new,code., with a commit message of "This").

[mabshoff]

We need to escape the '"' (and probably some other characters):

[mabshoff@localhost ~]$ ./foo.bash commit -m "This is my great new code."
commit -m This is my great new code.
[mabshoff@localhost ~]$ ./foo.bash commit -m \"This is my great new code.\"
commit -m "This is my great new code."

where foo.bash is

#!/bin/bash
echo "$@"

Cheers,

Michael