Re: [PATCH] prompt: do not double-discriminate detached HEAD

I think color in terminals should be used to highlight and make it easier to see
textual information, not to replace them. So I would keep the parenthesis.

+                               test -n "${GIT_PS1_SHOWCOLORHINTS-}" || b="($b)"

Also, the proposed change has a side-effect because color is not possible in
non-pc mode, even if GIT_PS1_SHOWCOLORHINTS is defined. (Non-pc mode
with GIT_PS1_SHOWCOLORHINTS defined would make the detached HEAD not be
shown neither in red nor within parenthesis).

Regards,

Eduardo R. D'Avila