Log error output when a git command fails

[orien]

Following on from #3738. This time focusing on just the class that directs stderr to /dev/null: the GitRepository class.

[grosser]

I like the idea/implementation,
I'm worried that this will hide stderr when executing a command via the UI though
(as in the err output will no longer show unless the command fails at the end, and it will only show at the end)
so for that case we should still interleave the stderr ?

[orien]

I like the idea/implementation, I'm worried that this will hide stderr when executing a command via the UI though (as in the err output will no longer show unless the command fails at the end, and it will only show at the end) so for that case we should still interleave the stderr ?

That's very true. I will focus the proposal.

[grosser]

super clean solution 🎉