Raise informative error when path nodes point to directories.

[tobiasraabe]

No description provided.

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Comparison is base (6d2c07f) 96.40% compared to head (1943368) 96.40%.

❗ Current head 1943368 differs from pull request most recent head a16cd46. Consider uploading reports for the commit a16cd46 to get more accurate results

Additional details and impacted files

@@           Coverage Diff           @@
##             main     #484   +/-   ##
=======================================
  Coverage   96.40%   96.40%           
=======================================
  Files         104      104           
  Lines        8839     8856   +17     
=======================================
+ Hits         8521     8538   +17     
  Misses        318      318           

Flag	Coverage Δ
end_to_end	82.66% <52.38%> (-0.08%)	⬇️
integration	40.45% <23.80%> (-0.03%)	⬇️
unit	67.77% <80.95%> (+0.10%)	⬆️

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Files	Coverage Δ
src/_pytask/collect.py	94.20% <100.00%> (+0.14%)	⬆️
src/_pytask/execute.py	99.43% <100.00%> (ø)
tests/test_collect.py	97.30% <100.00%> (+0.13%)	⬆️
tests/test_execute.py	99.25% <100.00%> (ø)

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