Fix weird duplicating space issue

[AridTag]

I was getting a strange duplicating spaces issue seen here

After this change to using [string]::Format it looks like this

[AridTag]

I just learned that this can be fixed by instead replacing your original strings given to Write-Host with something like this (" $($branchSymbol) $($status.Branch)") instead of [string]::Format

So I added another commit that changes to that. It's the same style that posh-git uses