Fix copying code examples in docs.

[tobiasraabe]

No description provided.

[codecov]

Codecov Report

Merging #20 into main will increase coverage by 14.73%.
The diff coverage is n/a.

@@             Coverage Diff             @@
##             main      #20       +/-   ##
===========================================
+ Coverage   80.68%   95.41%   +14.73%     
===========================================
  Files          27       27               
  Lines        1527     1527               
===========================================
+ Hits         1232     1457      +225     
+ Misses        295       70      -225     

Flag	Coverage Δ
#end_to_end	94.04% <ø> (?)
#integration	51.66% <ø> (ø)
#unit	78.19% <ø> (ø)

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Impacted Files	Coverage Δ
src/_pytask/mark/expression.py	98.34% <0.00%> (+0.82%)	⬆️
src/_pytask/mark/structures.py	91.20% <0.00%> (+1.09%)	⬆️
src/_pytask/nodes.py	95.18% <0.00%> (+1.20%)	⬆️
src/_pytask/parametrize.py	100.00% <0.00%> (+1.33%)	⬆️
src/_pytask/logging.py	92.85% <0.00%> (+3.57%)	⬆️
src/_pytask/execute.py	96.52% <0.00%> (+10.43%)	⬆️
src/_pytask/config.py	100.00% <0.00%> (+10.44%)	⬆️
src/_pytask/report.py	100.00% <0.00%> (+12.82%)	⬆️
src/_pytask/resolve_dependencies.py	97.82% <0.00%> (+14.13%)	⬆️
src/_pytask/collect.py	94.01% <0.00%> (+15.38%)	⬆️
... and 5 more

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