Corrected example in docs

[bart-degreed]

Closes #1085.

[codecov]

Codecov Report

Merging #1087 (51e465f) into master (5c2c40b) will not change coverage.
The diff coverage is n/a.

❗ Current head 51e465f differs from pull request most recent head a9ddeab. Consider uploading reports for the commit a9ddeab to get more accurate results

@@           Coverage Diff           @@
##           master    #1087   +/-   ##
=======================================
  Coverage   88.66%   88.66%           
=======================================
  Files         248      248           
  Lines        7086     7086           
=======================================
  Hits         6283     6283           
  Misses        803      803           

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