Fixed an incorrect sentence in the docs (GH-17205)

Fixed an incorrect sentence in Doc/c-api/mapping.rst I fell on
while translating the file.

skip issue

Automerge-Triggered-By: @csabella

Aveheuzed committed 6y ago

06ca2a2be9374ac390e9407685ccce941ab9ffa2

Parent: 046442d

Committed by Miss Islington (bot) <31488909+miss-islington@users.noreply.github.com> on 11/21/2019, 1:19:00 AM