Fix whitespace in PowerShell scripts

[papeh]

This change is 

[github-actions]

NUnit Tests

    1 files  ±0      1 suites  ±0   6m 41s ⏱️ +46s
4 074 tests ±0  4 003 ✅ ±0  71 💤 ±0  0 ❌ ±0 
4 083 runs  ±0  4 012 ✅ ±0  71 💤 ±0  0 ❌ ±0 

Results for commit fcc7e13. ± Comparison against base commit 28e9888.

♻️ This comment has been updated with latest results.

[papeh]

I discovered that replacing ' ' with '\t' replaces mid-line occurrences that should be left alone, so I reprocessed all files with regexes to check only the beginning and end of each line. This is now ready.