fix and simplify

9 jobs for fixing_nan in 8 minutes and 14 seconds (queued for 1 second)
Status Job ID Name Coverage
  Build Docker
passed #789322
build_docker_from_cache

00:00:14

 
  Test
passed #789324
test_mpi

00:04:13

passed #789323
test_serial

00:04:58

80.0%
 
  Demo Runs
passed #789329
run_bernoulli

00:00:25

passed #789330
run_curve_fitting

00:00:23

passed #789326
run_getting_started_1

00:00:29

passed #789327
run_getting_started_2

00:01:15

passed #789328
run_getting_started_3

00:03:00

passed #789325
run_ipynb

00:01:26