BUG: fix Series.interpolate(method='index') with unsorted index#29943

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TomAugspurger merged 2 commits intopandas-dev:masterfrom

immaxchen:fix-interpolate-index-method-gh21037

Dec 3, 2019

Commits on Dec 1, 2019

fix series interpolate bug with unsorted index GH21037
immaxchen
committed

Commits on Dec 2, 2019

revised as requested
immaxchen
committed