Squashed 'bash-git-prompt/' content from commit 986189c

git-subtree-dir: bash-git-prompt
git-subtree-split: 986189ccc2db9f0988396059d717c6b1a7271dba
Merge commit '6dded5a44651e20fc7af09bec952a87b38170d74' as 'bash-git-prompt'