add :none formatter

[t-bltg]

Fix #4475.

[codecov]

Codecov Report

Base: 90.49% // Head: 90.53% // Increases project coverage by +0.03% 🎉

Coverage data is based on head (eda69e9) compared to base (48a53a0).
Patch coverage: 88.88% of modified lines in pull request are covered.

Additional details and impacted files

@@            Coverage Diff             @@
##           master    #4483      +/-   ##
==========================================
+ Coverage   90.49%   90.53%   +0.03%     
==========================================
  Files          40       40              
  Lines        7662     7660       -2     
==========================================
+ Hits         6934     6935       +1     
+ Misses        728      725       -3     

Impacted Files	Coverage Δ
src/axes.jl	89.93% <66.66%> (-0.18%)	⬇️
src/utils.jl	93.14% <100.00%> (+0.65%)	⬆️

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