git ps ls is showing `rr+` when GPG signature changes

[drewdeponte]

To fix this we should change the implementation of commitHashContent(ref:) to instead of filtering content out of getShowNoColor() instead implement something to use the following:

git show --no-color --pretty="tformat:author %an <%ae> %aI%n%n    %B"

This has the benefit of us controling what is included and therefore not having to worry about other things we missed.

[drewdeponte]

I have implemented changes to address this in #57 and another dependent pull request that can be made once I get #57 published into mainline.