Fix some test failures on Windows
Fix some test failures on Windows

Our tests are checking for stdout output which is specific to unix path
separators. This changes these tests to allow any character in those
positions. This could be more specific about exactly what character is
allowed based on the platform, but the signal to noise ratio there would
get insane, and I don't think it's worthwhile.

We still have some failures related to file lock contention which will
be a bit harder to fix.

sgrif/diesel,mcasper/diesel,mcasper/diesel,diesel-rs/diesel,sgrif/diesel,diesel-rs/diesel,cascalheira/diesel,cascalheira/diesel