Those lines aren’t code, they shouldn’t actually be in code tags, but in samp (I vaguely remember a monk starting a thread here about that, not sure if it’s allowed now), or as a fallback, in pre.

Yes they should. PerlMonks FAQ: Markup in the Monastery

so yes, it should be the OP who should fix his paste, because it’s broken.

I'm afraid this OP has proven PEBKAC is his religion

so I don’t need CSS to mangle people’s code for me

Then you need to stop telling people to edit stuff in-between code tags because it doesn't look right according to your settings/browser