In strip_ilwdchar, gracefully handle blank values (None)

3 jobs for strip-ilwdchar-handle-none in 3 minutes and 4 seconds (queued for 1 second)
Status Job ID Name Coverage
  Build
passed #691451
build-python27

00:02:09

passed #691452
build-python37

00:02:09

 
  Docs
passed #691453
docs

00:00:54