Backport PR #39800 on branch 1.2.x (Regression in to_excel when setting duplicate column names)#39827

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simonjayhawkins merged 1 commit intopandas-dev:1.2.xfrom

meeseeksmachine:auto-backport-of-pr-39800-on-1.2.x

Feb 16, 2021

Commits on Feb 15, 2021

Backport PR #39800: Regression in to_excel when setting duplicate column names

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