DOC: added example to Series.map showing use of na_action parameter (GH14231)#14232

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jorisvandenbossche merged 1 commit intopandas-dev:masterfrom

shawnheide:DOC_14231

Sep 16, 2016

Commits on Sep 16, 2016

DOC: closes #14231, refines parameter description and adds additional example to Series.map that shows use of na_action parameter.
shawnheide
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