t1507: inline full_name()
Before, we were running `test_must_fail full_name`. However, `test_must_fail` should only be used on git commands. Inline full_name() so that we can use test_must_fail on the git command directly. When full_name() was introduced in 28fb84382b (Introduce <branch>@{upstream} notation, 2009-09-10), the `git -C` option wasn't available yet (since it was introduced in 44e1e4d67d (git: run in a directory given with -C option, 2013-09-09)). As a result, the helper function removed the need to manually cd each time. However, since `git -C` is available now, we can just use that instead and inline full_name(). An alternate approach was taken where we taught full_name() to accept an optional `!` arg to trigger test_must_fail behavior. However, this added more unnecessary complexity than inlining so we inline instead. Signed-off-by: Denton Liu <liu.denton@gmail.com> Signed-off-by: Junio C Hamano <gitster@pobox.com>