[SPARK-32162][PYTHON][TESTS] Improve error message of Pandas grouped map test with window#28987

BryanCutler wants to merge 3 commits intoapache:masterapache/spark:masterfrom

BryanCutler:pandas-grouped-map-test-output-SPARK-32162BryanCutler/spark:pandas-grouped-map-test-output-SPARK-32162Copy head branch name to clipboard