Fix linter warnings

5 jobs for master in 6 minutes (queued for 1 second)
Status Job ID Name Coverage
  Lint
passed #3072
gitlabdocker
lint program

00:01:02

 
  Build
passed #3073
gitlabdocker
build program

00:00:52

 
  Test
passed #3074
gitlabdocker
test program

00:01:36

 
  Docs
passed #3075
gitlabdocker
build docs

00:02:29

 
  Deploy
manual #3076
gitlabdocker allowed to fail manual
deploy program