Add docformatter.

[tobiasraabe]

Committed via https://github.com/asottile/all-repos

[codecov]

Codecov Report

Merging #29 (257b4ce) into main (78bfa18) will not change coverage.
The diff coverage is 100.00%.

@@           Coverage Diff           @@
##             main      #29   +/-   ##
=======================================
  Coverage   97.87%   97.87%           
=======================================
  Files          15       15           
  Lines         471      471           
=======================================
  Hits          461      461           
  Misses         10       10           

Flag	Coverage Δ
end_to_end	95.54% <100.00%> (ø)
unit	51.16% <0.00%> (ø)

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

Impacted Files	Coverage Δ
src/pytask_r/collect.py	100.00% <100.00%> (ø)

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