PR Summary

The fundamental problem is that Microsoft cpp command line parsing rules indicate that a backslash followed by a quote is a quote, otherwise, it is literal. So this:

pwsh -noexit -workingdirectory "c:\"

Is received as c:" at argument parsing time. Of course, this is a bit more complicated as Open Here also uses -Command. So:

pwsh -noexit -workingdirectory "c:\" -command 1+1

Becomes c:" -command 1+1 as the argument value to -workingdirectory. And -command must be last in the command line.
Fix is to add a hidden switch for the purpose of the Open Here context menu called -RemoveWorkingDirectoryTrailingCharacter. This allows Open Here's command line to pad the path:

pwsh -noexit -removeworkingdirectorytrailingcharacter -workingdirectory "C:\!" -command 1+1

Now all the args can get parsed appropriately as the working directory path never ends with a trailing backslash.

Fix #8278

PR Checklist

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