Fix docs

[agdestein]

Make failure mechanism working again.

[SCiarella]

we can use an @example block in sciml.md

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 59.39%. Comparing base (7745807) to head (e3e715b).
Report is 18 commits behind head on main.

Additional details and impacted files

@@           Coverage Diff           @@
##             main     #120   +/-   ##
=======================================
  Coverage   59.39%   59.39%           
=======================================
  Files          30       30           
  Lines        3699     3699           
=======================================
  Hits         2197     2197           
  Misses       1502     1502           

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