Fix linter warnings

5 jobs for master in 4 minutes and 32 seconds (queued for 6 minutes and 36 seconds)
Status Job ID Name Coverage
  Lint
passed #4405
gitlabdocker
lint program

00:00:37

 
  Build
passed #4406
gitlabdocker
build program

00:00:13

 
  Test
passed #4407
gitlabdocker
test program

00:00:58

 
  Docs
passed #4408
gitlabdocker
build docs

00:02:42

 
  Deploy
manual #4409
gitlabdocker allowed to fail manual
deploy program