Tests failing on Windows

[martijnhoekstra]

Tests on Windows are failing for multiple reasons

• Path separators are assumed and checked to be "/"
• partest fails to copy ValueClasses.flags
• newline differences
• default encoding problems in slurp and writeAll

Some fixes in:

• martijnhoekstra@e4adf40 (file paths and a missing string interpolator)
• martijnhoekstra@87e24e7 (line endings for repl session)
• martijnhoekstra@76f5ff3 (that can probably be done a lot better)

[smarter]

Thanks for looking into this! Would you mind opening a pull request with your fixes? For martijnhoekstra@76f5ff3 you might be able to set UTF8 as the default codec for everything in tests instead. I'm not sure what the best way to do this is, maybe pass -Dfile.encoding=UTF8 to the jvm used to run tests? /cc @sjrd

[martijnhoekstra]

@smarter now that I'm properly including scala-scala, I have a bunch more encoding problems, I'll try to find a better solution. would you like a PR for the first two commits first?

[smarter]

Sure.

[martijnhoekstra]

done in #1493

[smarter]

#1494 was merged so I think we can close this one.