Changes to examples scripts

[bwohlberg]

• Improve notebook build script
  • don't terminate entire run on single notebook execution failure
  • clean up workers after keyboard interrupt
• Minor edits to example script docstrings

[codecov]

Codecov Report

Merging #137 (d525a83) into main (1ecc960) will not change coverage.
The diff coverage is n/a.

@@           Coverage Diff           @@
##             main     #137   +/-   ##
=======================================
  Coverage   91.92%   91.92%           
=======================================
  Files          47       47           
  Lines        3206     3206           
=======================================
  Hits         2947     2947           
  Misses        259      259           

Flag	Coverage Δ
unittests	91.92% <ø> (ø)

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[FernandoDavis]

Everything looks fine to me! There's one nitpick but that shouldn't hold back the PR and can be discussed on Monday with the other pending edit.