tests: inform on Windows about unnecessary glob lines
When glob lines directly match on windows, "/" (and not "\") was output in the
path on the line. No glob matching is necessary in this case.
The test output will look like this (when 5 tests have passed and no 4 has an
unnecessary glob):
...
Info, unnecessary glob: info about some/thing (glob)
..
[ original upstream message ]
syntax: glob
*.pyc
*.pyo
*~
*.swp
*.orig
*.rej
.DS_Store
build/*
MANIFEST