Fix typo in docstring (repeated word).

5 jobs for doc-fixes in 3 minutes and 5 seconds (queued for 13 seconds)
latest
Status Name Job ID Coverage
  Build
passed build:lib #17723
docker

00:02:04

 
  Test
passed test:lib #17724
docker

00:01:01

 
  Trigger
passed trigger:android

passed trigger:javascript

passed trigger:python