tests: add test demonstrating buggy path handling
`hg debugupgraderepo` is currently buggy with regards to path
handling when copying files in .hg/store/. Specifically, it applies
the store filename encoding to paths instead of operating on raw
files.
This commit adds a test demonstrating the buggy behavior.
Mercurial
=========
Mercurial is a fast, easy to use, distributed revision control tool
for software developers.
Basic install:
$ make # see install targets
$ make install # do a system-wide install
$ hg debuginstall # sanity-check setup
$ hg # see help
Running without installing:
$ make local # build for inplace usage
$ ./hg --version # should show the latest version
See https://mercurial-scm.org/ for detailed installation
instructions, platform-specific notes, and Mercurial user information.