Fix warning: wrap vararg in unionall

[jakobnissen]

No description provided.

[codecov-commenter]

Codecov Report

Merging #18 (4c0586b) into main (7c7f0b6) will increase coverage by 0.10%.
The diff coverage is 75.47%.

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@@            Coverage Diff             @@
##             main      #18      +/-   ##
==========================================
+ Coverage   75.05%   75.16%   +0.10%     
==========================================
  Files           6        6              
  Lines         417      459      +42     
==========================================
+ Hits          313      345      +32     
- Misses        104      114      +10     

Flag	Coverage Δ
unittests	75.16% <75.47%> (+0.10%)	⬆️

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Impacted Files	Coverage Δ
src/search.jl	44.15% <0.00%> (-5.12%)	⬇️
src/util.jl	83.63% <ø> (ø)
src/StringViews.jl	96.92% <75.00%> (+0.09%)	⬆️
src/regex.jl	89.00% <94.59%> (+2.23%)	⬆️
src/decoding.jl	86.36% <100.00%> (ø)

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