Fix typo in unnecessary generator message

[tsx]

No description provided.

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[codecov-io]

Codecov Report

Merging #163 (08543c8) into master (bd7f088) will not change coverage.
The diff coverage is n/a.

@@           Coverage Diff           @@
##           master     #163   +/-   ##
=======================================
  Coverage   85.04%   85.04%           
=======================================
  Files          89       89           
  Lines        3623     3623           
=======================================
  Hits         3081     3081           
  Misses        542      542           

Impacted Files	Coverage Δ
fixit/rules/rewrite_to_comprehension.py	100.00% <ø> (ø)

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[jimmylai]

@tsx the proposed change looks good! I can merge it after you sign the CLA.

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Thank you for signing our Contributor License Agreement. We can now accept your code for this (and any) Facebook open source project. Thanks!