More tests for print

[tkf]

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[codecov-commenter]

Codecov Report

Merging #48 (d3d7c72) into master (cc6d147) will decrease coverage by 0.36%.
The diff coverage is n/a.

@@            Coverage Diff             @@
##           master      #48      +/-   ##
==========================================
- Coverage   87.30%   86.94%   -0.37%     
==========================================
  Files          14       14              
  Lines        1434     1432       -2     
==========================================
- Hits         1252     1245       -7     
- Misses        182      187       +5     

Flag	Coverage Δ
unittests	86.94% <ø> (-0.37%)	⬇️

Flags with carried forward coverage won't be shown. Click here to find out more.

Impacted Files	Coverage Δ
src/promise.jl	70.37% <0.00%> (-18.52%)	⬇️
src/stack.jl	89.28% <0.00%> (-7.15%)	⬇️
src/lcrq.jl	86.62% <0.00%> (-6.40%)	⬇️
src/msqueue.jl	85.41% <0.00%> (-2.09%)	⬇️
src/dict.jl	88.80% <0.00%> (-0.81%)	⬇️
src/ssqueue.jl	95.74% <0.00%> (-0.71%)	⬇️
src/utils.jl	67.74% <0.00%> (+0.80%)	⬆️
src/dlcrq.jl	88.11% <0.00%> (+4.87%)	⬆️

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