Fix docstrings

3 jobs for master in 61 minutes and 4 seconds (queued for 2 seconds)
Status Job ID Name Coverage
  Test
passed #5025
amd64
job_clang_amd64

01:01:03

passed #5026
amd64
job_clang_cxx_amd64

00:27:55

passed #5024
amd64
job_gcc_amd64

00:48:50