Render math in argmin-testfunctions with KaTeX (part 2)

[airwoodix]

Follow-up to #530.

Render the math in argmin-testfunctions with KaTeX for the documentation that had not been converted yet. No code changes.

The function in mccorminck.rs seems to be call "McCormick" (without the n) on the Internet. See e.g. wikipedia and here. I used this spelling in the documentation, but didn't change the function or module name, to not introduce a breaking change in this documentation-only PR. @stefan-k Would you consider a PR changing the function and module names?

[stefan-k]

Thanks so much, this is again absolutely excellent! :)

Oops, at least I was consistent with the typo! I'd appreciate it if you could fix this in a PR, even if it is a breaking change :)

[stefan-k]

Pipeline should be fixed with #582

[codecov-commenter]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 92.12%. Comparing base (b35808a) to head (831fc49).

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #581      +/-   ##
==========================================
- Coverage   92.13%   92.12%   -0.01%     
==========================================
  Files         177      177              
  Lines       23672    23672              
==========================================
- Hits        21810    21808       -2     
- Misses       1862     1864       +2     

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[airwoodix]

Thanks @stefan-k for the feedback and the pipeline fix. I rebased this PR's branch onto main.