Make sure that extract_ancestors is not compared with path_compressed…

[hyanwong]

… ones

[codecov]

Codecov Report

Merging #175 into master will not change coverage.
The diff coverage is n/a.

@@           Coverage Diff           @@
##           master     #175   +/-   ##
=======================================
  Coverage   93.93%   93.93%           
=======================================
  Files          11       11           
  Lines        2885     2885           
  Branches      507      507           
=======================================
  Hits         2710     2710           
  Misses        145      145           
  Partials       30       30

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[jeromekelleher]

LGTM