Add a space after < redirects, required by cmd in Wine 10

[IsaacG]

I have no idea why, but cmd in Wine 9 accepts set /p var=<file and cmd in Wine 10 chokes on that, requiring a space in < file. Same exact cmd version. In order to bump the OS version and, by extension, the Wine version, we need to fix the tests here.

See exercism/batch-test-runner#57

[github-actions]

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[BNAndras]

https://gitlab.winehq.org/wine/wine/-/releases/wine-10.0 mentions a rewritten input parser for cmd so possibly that is why this behavior changed.

[GroophyLifefor]

lgtm