BUGFIX: escape `quotechar` when `escapechar` is not None (even if quo… #48901

Job	Run time
ASV Benchmarks	21m 32s
Docstring validation, typing, and other manual pre-commit hooks	18m 7s
Test install requirements-dev.txt	2m 38s
Build Docker Dev Environment	2m 52s
	45m 9s

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