Fix for bug introduced in #22

[torfjelde]

Fixes bug introduced in #22

[codecov]

Codecov Report

Merging #24 (30aa890) into main (34fc3e1) will increase coverage by 0.59%.
The diff coverage is 100.00%.

@@            Coverage Diff             @@
##             main      #24      +/-   ##
==========================================
+ Coverage   82.45%   83.05%   +0.59%     
==========================================
  Files           1        1              
  Lines          57       59       +2     
==========================================
+ Hits           47       49       +2     
  Misses         10       10              

Impacted Files	Coverage Δ
src/varname.jl	83.05% <100.00%> (+0.59%)	⬆️

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[yebai]

Thanks for the fix, @torfjelde