fix integer rounding on column cleaning

[shouples]

No description provided.

[codecov-commenter]

Codecov Report

Merging #311 (dc17c11) into main (1f1fe3b) will not change coverage.
Report is 1 commits behind head on main.
The diff coverage is 100.00%.

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@@           Coverage Diff           @@
##             main     #311   +/-   ##
=======================================
  Coverage   84.00%   84.00%           
=======================================
  Files          84       84           
  Lines        3032     3032           
=======================================
  Hits         2547     2547           
  Misses        485      485           

Files	Coverage Δ
src/dx/utils/formatting.py	87.78% <100.00%> (ø)

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