Merge branch 'passoft_py3_bugs' into 'master'

Fix "error writing fixed header" bug

See merge request !9
4 jobs for update_meta_yaml in 40 seconds (queued for 3 seconds)
Status Name Job ID Coverage
  Test
passed linting #3289
passoft

00:00:40

passed python3.6 #3290
passoft

00:00:37

passed python3.7 #3291
passoft

00:00:35

passed python3.8 #3292
passoft

00:00:31