Corrects an ambiguity in string formatting by merging the unit's prefix with the first unit's prefix.

[chrisguidry]

No description provided.

[codecov]

Codecov Report

Merging #46 (a5d5d3e) into main (5a13446) will not change coverage.
The diff coverage is 100.00%.

@@            Coverage Diff            @@
##              main       #46   +/-   ##
=========================================
  Coverage   100.00%   100.00%           
=========================================
  Files           73        73           
  Lines         3324      3332    +8     
  Branches       307       308    +1     
=========================================
+ Hits          3324      3332    +8     

Flag	Coverage Δ
python-3.10	100.00% <100.00%> (ø)
python-3.8	100.00% <100.00%> (?)
python-3.9	100.00% <100.00%> (ø)

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Impacted Files	Coverage Δ
src/measured/__init__.py	100.00% <100.00%> (ø)
tests/test_formatting.py	100.00% <100.00%> (ø)
tests/test_parsing.py	100.00% <100.00%> (ø)
tests/test_prefix.py	100.00% <100.00%> (ø)