TST: ensure DataFrame.tail(0) preserves dtypes #63453
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doc/source/whatsnew/vX.X.X.rstfile if fixing a bug or adding a new feature.AGENTS.md.What
Adds a test ensuring that DataFrame.tail(0) preserves column dtypes.
Why
Empty DataFrames returned by slicing methods should retain dtype
information. This test guards against regressions in tail(0) behavior.
How
Adds a focused test in pandas/tests/frame/methods/test_head_tail.py.