test-lib: fix color reset in say_color()

When executing a single test with colors enabled, the cursor was not set
back to the previous one, and you had to hit an extra enter to get it
back.

Work around this problem by calling 'tput sgr0' before printing the
final newline.

Signed-off-by: Miklos Vajna <vmiklos@frugalware.org>
Signed-off-by: Shawn O. Pearce <spearce@spearce.org>

t/test-lib.sh

@@ -112,8 +112,9 @@ if test -n "$color"; then
 			*) test -n "$quiet" && return;;
 		esac
 		shift
-		echo "* $*"
+		printf "* $*"
 		tput sgr0
+		echo
 		)
 	}
 else