tests: keep temporary repos underneath test/repos
tests: keep temporary repos underneath test/repos

test_repo.py was creating directories in the literal
test/~/foo/... directory.

This commit replaces "~" with "repos".

Some minor whitespace issues were cleaned up as well.

Signed-off-by: David Aguilar <9de348c050f7cd1ca590883733c4e531ce610bf4@gmail.com>

pengshp/GitPython,avinassh/GitPython,breavo/GitPython,cdht/GitPython,dpursehouse/GitPython,h4ck3rm1k3/GitPython,hvnsweeting/GitPython,OpenInkpot-archive/iplinux-python-git,gitpython-developers/gitpython,beni55/GitPython,cool-RR/GitPython,cool-RR/GitPython,cool-RR/GitPython,gitpython-developers/GitPython,StyXman/GitPython,bwrsandman/GitPython,roidelapluie/GitPython,StyXman/GitPython,beni55/GitPython,h4ck3rm1k3/GitPython,expobrain/GitPython,avinassh/GitPython,zsjohny/GitPython,Conjuro/GitPython,cdht/GitPython,avinassh/GitPython,manasdk/GitPython,Conjuro/GitPython,StyXman/GitPython,nvie/GitPython,zsjohny/GitPython,roidelapluie/GitPython,Conjuro/GitPython,expobrain/GitPython,cdht/GitPython,nvie/GitPython,jeblair/GitPython,bwrsandman/GitPython,gitpython-developers/gitpython,dpursehouse/GitPython,jeblair/GitPython,manasdk/GitPython,ghtdak/GitPython,pengshp/GitPython,hvnsweeting/GitPython,gitpython-developers/GitPython,breavo/GitPython,zsjohny/GitPython,ghtdak/GitPython,pengshp/GitPython,bwrsandman/GitPython