Use quotes to avoid space-in-path issues with cygpath
No need in some purges in `Kernel.WarningTest`
No need for `Stream.` prefix
Merge pull request #2671 from lexmag/no-purge

No need in some purges in `Kernel.WarningTest`
Merge pull request #2670 from chyndman/cygpath-quotes

Use quotes to avoid space-in-path issues with cygpath