Fix $GIT_EDITOR invocation if it has whitespace
Fix $GIT_EDITOR invocation if it has whitespace

If GIT_EDITOR is "emacs -nw" (containing a whitespace),
subcommand.call() will fail.

Split the variable with whitespace.

Reported by: David Gibson <dgibson@redhat.com>
Signed-off-by: Fam Zheng <df9fd617995bad07eac70e27aa3fe5069270e3bd@redhat.com>

stefanha/git-publish,stefanha/git-publish