builtin/help.c: speed up is_git_command() by checking for builtin commands first Since 2dce956 is_git_command() is a bit slow as it does file I/O in the call to list_commands_in_dir(). Avoid the file I/O by adding an early check for the builtin commands. Signed-off-by: Sebastian Schuberth <sschuberth@gmail.com> Signed-off-by: Junio C Hamano <gitster@pobox.com>