Close #1382

That way people who use it won't be deterred, while it unifies style
everywhere.

Found via `codespell -q 3 -S ./git/ext/gitdb,./test/fixtures/reflog_master,./test/fixtures/diff_mode_only,./test/fixtures/reflog_HEAD`

Fix #971. Partly resolve #703.

If the hook doesn't have a file extension, then Windows won't know how
to run it and you'll get "[WinError 193] %1 is not a valid Win32
application". It's very likely that it's a shell script of some kind, so
use bash.exe (commonly installed via Windows Subsystem for Linux). We
don't want to run all hooks with bash because they could be .bat files.

Update tests to get several hook ones working. More work necessary to
get commit-msg hook working. The hook writes to the wrong file because
it's not using forward slashes in the path:
C:\Users\idbrii\AppData\Local\Temp\bare_test_commit_msg_hook_successy5fo00du\CUsersidbriiAppDataLocalTempbare_test_commit_msg_hook_successy5fo00duCOMMIT_EDITMSG

This should ensure that tests are NOT packaged into
release package by setuptools, as tests are development
only
+ fixtures after moving

Signed-off-by: Konrad Weihmann <kweihmann@outlook.com>

This should ensure that tests are NOT packaged into
release package by setuptools, as tests are development
only
+ fixtures after moving

Signed-off-by: Konrad Weihmann <kweihmann@outlook.com>