Use Equals instead of Contains for asserting the status view content. This
solves the problem that we might assert Contains("↓2 repo"), but what it really
shows is "↑1↓2 repo", and the test still succeeds. At best this is confusing.
Also, this way we don't have to use the awkward DoesNotContain to check that it
really doesn't show a checkmark.
To do this, we need to fix two whitespace problems:
- there was always a space at the end for no reason. Simply remove it. It was
added in efb51eee96, but from looking at that diff it seems it was added
accidentally.
- there was a space at the beginning if the branch status was empty. This is
actually a cosmetic problem, for branches without a status the text was
indented by once space. Change this so that the space is added conditionally.
It's a bit awkward that we have to use Decolorise here, but this will go away
again later in this branch.
