Fix typo in docstring (repeated word).

9 jobs for master in 2 minutes and 33 seconds (queued for 9 seconds)
Status Name Job ID Coverage
  Build
passed build:lib #18090
docker

00:01:30

passed build:lib #17761
docker

00:01:18

 
  Test
failed test:lib #18091
docker

00:01:03

failed test:lib #18088
docker

00:01:00

failed test:lib #17762
docker

00:00:49

canceled test:lib #18089
docker

00:00:40

 
  Trigger
skipped trigger:android
skipped trigger:javascript
skipped trigger:python
 
Name Stage Failure
failed
test:lib Test
	  9 - OlmDecrypt (Failed)
10 - OlmSha256 (Failed)
11 - OlmSignature (Failed)
12 - OlmUsingMalloc (Failed)
13 - Session (Failed)
14 - PublicKey (Failed)
15 - SAS (Failed)
Cleaning up file based variables
ERROR: Job failed: command terminated with exit code 1