changed the z param

[roxyboy]

No description provided.

[codecov-io]

Codecov Report

Merging #4 into master will increase coverage by 0.41%.
The diff coverage is 100%.

@@            Coverage Diff             @@
##           master       #4      +/-   ##
==========================================
+ Coverage   38.25%   38.66%   +0.41%     
==========================================
  Files           4        4              
  Lines         149      150       +1     
==========================================
+ Hits           57       58       +1     
  Misses         92       92

Impacted Files	Coverage Δ
xomega/tests/test_xomega.py	100% <100%> (ø)	⬆️
xomega/xomega.py	27.71% <100%> (+0.88%)	⬆️

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