fixes a trailing space when local dir not clean (#453)
fixes a trailing space when local dir not clean (#453)

Explanation:

For some reason there's a trailing space, when there are changes available on the remote:

master {upstream/master } ↓·9|✔]$

After doing a `git pull`, the prompt is fine again:

master {upstream/master}|✔]$

This change trims the upstream var in gitstatus.sh
magicmonty/bash-git-prompt,gullevek/bash-git-prompt,gullevek/bash-git-prompt,gullevek/bash-git-prompt,magicmonty/bash-git-prompt,ogr3/bash-git-prompt,magicmonty/bash-git-prompt,ogr3/bash-git-prompt,ogr3/bash-git-prompt