tests: s/iotuil/ioutil/ typo

[srenatus]

Sorry, could not resist. 😄

[johanbrandhorst]

This is a wholesome PR if I've ever seen one. As I mentioned, this probably won't run just now but leave it in and we'll merge it when we can.

[johanbrandhorst]

Please rebase on master for new CI functionality.

[codecov-io]

Codecov Report

Merging #775 into master will not change coverage.
The diff coverage is n/a.

@@           Coverage Diff           @@
##           master     #775   +/-   ##
=======================================
  Coverage   53.37%   53.37%           
=======================================
  Files          30       30           
  Lines        3361     3361           
=======================================
  Hits         1794     1794           
  Misses       1392     1392           
  Partials      175      175

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[johanbrandhorst]

LGTM