Fix minor typo

[int-y1]

[dmoj-build]

Can one of the admins verify this patch?

[codecov-commenter]

Codecov Report

Base: 81.12% // Head: 80.85% // Decreases project coverage by -0.27% :warning:

Coverage data is based on head (a422fb9) compared to base (12b42f6). Patch coverage: 0.00% of modified lines in pull request are covered.

Additional details and impacted files

@@            Coverage Diff             @@
##           master    #1039      +/-   ##
==========================================
- Coverage   81.12%   80.85%   -0.28%     
==========================================
  Files         140      140              
  Lines        4790     4790              
==========================================
- Hits         3886     3873      -13     
- Misses        904      917      +13     

Impacted Files	Coverage Δ
dmoj/utils/helper_files.py	87.50% <0.00%> (ø)
dmoj/utils/communicate.py	88.15% <0.00%> (-5.27%)	:arrow_down:
dmoj/cptbox/isolate.py	48.17% <0.00%> (-3.05%)	:arrow_down:
dmoj/cptbox/compiler_isolate.py	46.80% <0.00%> (-2.13%)	:arrow_down:
dmoj/executors/base_executor.py	84.17% <0.00%> (-1.02%)	:arrow_down:

Help us with your feedback. Take ten seconds to tell us how you rate us. Have a feature suggestion? Share it here.

:umbrella: View full report at Codecov.
:loudspeaker: Do you have feedback about the report comment? Let us know in this issue.

[kiritofeng]

ok to test

[Riolku]

FreeBSD doesn't seem to be testing, otherwise LGTM...