Merge branch 'vs/complete-stash-show-p-fix'

The command line completion script (in contrib/) tried to complete "git stash -p" as if it were "git stash push -p", but it was too aggressive and also affected "git stash show -p", which has been corrected. * vs/complete-stash-show-p-fix: completion: don't override given stash subcommand with -p