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

[Ramkumar Ramachandra <artagnon@gmail.com>]

When GIT_PS1_SHOWCOLORHINTS is turned on, there is no need to put a
detached HEAD within parenthesis: the color can be used to discriminate
the detached HEAD.

Signed-off-by: Ramkumar Ramachandra <artagnon@gmail.com>
---
 For cuteness :)

 contrib/completion/git-prompt.sh | 5 ++++-
 t/t9903-bash-prompt.sh           | 2 +-
 2 files changed, 5 insertions(+), 2 deletions(-)

diff --git a/contrib/completion/git-prompt.sh b/contrib/completion/git-prompt.sh
index a81ef5a..37e66a2 100644
--- a/contrib/completion/git-prompt.sh
+++ b/contrib/completion/git-prompt.sh
@@ -372,7 +372,10 @@ __git_ps1 ()
 				esac 2>/dev/null)" ||
 
 				b="$short_sha..."
-				b="($b)"
+				# if there is no color, use
+				# parenthesis to indicate that the
+				# HEAD is detached
+				test -n "${GIT_PS1_SHOWCOLORHINTS-}" || b="($b)"
 			fi
 		fi
 	fi
diff --git a/t/t9903-bash-prompt.sh b/t/t9903-bash-prompt.sh
index 3c3e4e8..c44b1a6 100755
--- a/t/t9903-bash-prompt.sh
+++ b/t/t9903-bash-prompt.sh
@@ -450,7 +450,7 @@ test_expect_success 'prompt - bash color pc mode - branch name' '
 '
 
 test_expect_success 'prompt - bash color pc mode - detached head' '
-	printf "BEFORE: (${c_red}(%s...)${c_clear}):AFTER" $(git log -1 --format="%h" b1^) >expected &&
+	printf "BEFORE: (${c_red}%s...${c_clear}):AFTER" $(git log -1 --format="%h" b1^) >expected &&
 	git checkout b1^ &&
 	test_when_finished "git checkout master" &&
 	(
-- 
1.8.3.2.737.gcbc076a.dirty