Merge branch 'tg/stash-push'

"git stash save" takes a pathspec so that the local changes can be stashed away only partially. * tg/stash-push: stash: allow pathspecs in the no verb form stash: use stash_push for no verb form stash: teach 'push' (and 'create_stash') to honor pathspec stash: refactor stash_create stash: add test for the create command line arguments stash: introduce push verb