Fix example rendering in Mahalanobis docs

[navidcy]

No description provided.

[codecov-commenter]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 89.45%. Comparing base (b8cddf2) to head (dc11505).
⚠️ Report is 4 commits behind head on master.

❗ There is a different number of reports uploaded between BASE (b8cddf2) and HEAD (dc11505). Click for more details.

HEAD has 1 upload less than BASE

Flag	BASE (b8cddf2)	HEAD (dc11505)
	2	1

Additional details and impacted files

@@            Coverage Diff             @@
##           master     #254      +/-   ##
==========================================
- Coverage   95.27%   89.45%   -5.82%     
==========================================
  Files           9        9              
  Lines         867      531     -336     
==========================================
- Hits          826      475     -351     
- Misses         41       56      +15     

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