fix typo

git-flip-last.sh

#!/bin/bash

branch=$(git name-rev --name-only HEAD)
git rebase --onto HEAD~2 HEAD~1 HEAD
git cherry-pick ORIG_HEAD~1
git update-ref refs/heads/$branch $(git rev-parse HEAD)
git checkout --quiet $branch

# Instead of creating an independant bash script with the code above, 
# consider simply creating a git alias using the command below.
#
# USAGE: git flip-last
git config --global alias.flip-last "!branch=$(git name-rev --name-only HEAD); git rebase --quiet --onto HEAD~2 HEAD~1 HEAD; git cherry-pick ORIG_HEAD~1; git update-ref refs/heads/$branch $(git rev-parse HEAD); git checkout --quiet $branch"