Please rephrase* the word "this" in the following line:
See [Environment] for details on that technique. If possible, avoid using this as it will make relative files passed through the command line fail unless it is only a single file given (which will be automatically corrected).
* Replace it with either "avoid using [Environment]" or "avoid using WorkingDirectory". If it's the former, then add the word "but": "But if possible, avoid using [Environment]".
I've inserted a paragraph break in there. That makes it most clear without cluttering the language.
I am a Christian and a developer and moderator here.
“A soft answer turns away wrath, but a harsh word stirs up anger.” – Proverbs 15:1
Did you edit it directly or did you edit some sort of template that was yet to be uploaded?
He means in the beta version of the manual linked from the Development page. It'll be switched over this month.
Sometimes, the impossible can become possible, if you're awesome!