PR Summary

FixWildcardPattern.Escape to escape lone backticks correctly.

I have added the-like specific tests in Pester and theEscape() method conversion tests in XUnit.

Given backtick is included inSpecialChars which also has wildcard chars, it seems more straightforward to just doSpecialChars.Contains(ch) instead ofIsWildcardChar(ch) || ch == escapeChar in theEscape() method.

PR Context

Fixes#16306

cc@IISResetMe

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