update examples

4 jobs for master in 1 minute (queued for 2 seconds)
Status Name Job ID Coverage
  Lint
passed black #602216

00:00:19

failed cpplint #602217

00:00:19

passed flake8 #602215

00:00:21

 
  Deploy
skipped pages #602218
 
Name Stage Failure
failed
cpplint Lint
source/finite_difference.h:259:  Missing space after ,  [whitespace/comma] [3]
source/finite_difference.h:260: Missing space after , [whitespace/comma] [3]
Done processing source/finite_difference.h
Done processing source/hankel.h
Done processing source/hankel_py.cpp
Done processing source/solver_py.cpp
Total errors found: 16
Cleaning up file based variables
ERROR: Job failed: exit code 1