Nope, nor did that repo have the system prompts that brought is MechaHitler, nor the time earlier this year where it started injecting Trump into every completion.
The Grok repo is a smokescreen for deniability (just not particularly plausible).
I would be surprised if that line in the prompt caused it without the other thing they did just before mecha Hitler: Elon created a Twitter thread asking users to submit divisive politically incorrect facts for grok training. It was full of Holocaust denial and white supremecy stuff.
The Grok repo is a smokescreen for deniability (just not particularly plausible).