Cleanup and cosmetics in core files

9 jobs for linearizationtests in 8 minutes and 9 seconds (queued for 1 second)
Status Job ID Name Coverage
  Build Docker
passed #895135
build_docker_from_cache

00:00:17

 
  Test
passed #895137
test_mpi

00:04:15

passed #895136
test_serial

00:04:51

81.0%
 
  Demo Runs
passed #895142
run_bernoulli

00:00:29

passed #895143
run_curve_fitting

00:00:26

passed #895139
run_getting_started_1

00:00:32

passed #895140
run_getting_started_2

00:01:09

passed #895141
run_getting_started_3

00:03:00

passed #895138
run_ipynb

00:01:24