Merge branch 'js/detached-stash'
* js/detached-stash:
t3903: fix broken test_must_fail calls
detached-stash: update Documentation
detached-stash: tests of git stash with stash-like arguments
detached-stash: simplify git stash show
detached-stash: simplify git stash branch
detached-stash: refactor git stash pop implementation
detached-stash: simplify stash_drop
detached-stash: simplify stash_apply
detached-stash: work around git rev-parse failure to detect bad log refs
detached-stash: introduce parse_flags_and_revs function