t0060: verify that basename() and dirname() work as expected
Unfortunately, some libgen implementations yield outcomes different
from what Git expects. For example, mingw-w64-crt provides a basename()
function, that shortens `path0/` to `path`!
So let's verify that the basename() and dirname() functions we use
conform to what Git expects.
Derived-from-code-by: Ramsay Jones <ramsay@ramsayjones.plus.com>
Signed-off-by: Johannes Schindelin <johannes.schindelin@gmx.de>
Signed-off-by: Junio C Hamano <gitster@pobox.com>