Add use of Transform for wrapping RFE instances to docstring

[ablaom]

• Locally chec rendering of documentation

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 93.58%. Comparing base (ba24242) to head (53b76ad).
⚠️ Report is 2 commits behind head on dev.

Additional details and impacted files

@@           Coverage Diff           @@
##              dev      #38   +/-   ##
=======================================
  Coverage   93.58%   93.58%           
=======================================
  Files           4        4           
  Lines         156      156           
=======================================
  Hits          146      146           
  Misses         10       10           

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