[BUG] `git stash drop --help` removes stash

From: Alexander Daniel <alexander.daniel@openforce.com>
Date: May 22, 2012, 07:29 UTC
Message-ID: <95877607-FED0-41C0-9F12-B91FE9DE7871@openforce.com>

SUMMARY `git stash drop --help` removes stash@{0}

VERSION $ git --version git version 1.7.10.2

STEPS TO REPRODUCE
- put something on the stash with `git stash`
- Naively try to show help for `git stash drop` with `git stash drop --help`
- `git stash drop --help` actually removes stash@{0}:

  $ git stash drop --help
  Dropped refs/stash@{0} (bfee7acd94b85e2b0bb5ef172893872140ba0520)

EXPECTED BEHAVIOR: Invalid parameter error message is displayed (no modification of the stash)

Alex