Add testing parallel code lesson

[connoraird]

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[github-actions]

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🤖 This automated message can help you check the rendered files in your submission for clarity. If you have any questions, please feel free to open an issue in {sandpaper}.

If you have files that automatically render output (e.g. R Markdown), then you should check for the following:

• 🎯 correct output
• 🖼️ correct figures
• ❓ new warnings
• ‼️ new errors

Rendered Changes

🔍 Inspect the changes: https://github.com/UCL-ARC/fortran-unit-testing-lesson/compare/md-outputs..md-outputs-PR-20

The following changes were observed in the rendered markdown documents:

 5-testing-parallel-code.md (new) | 144 +++++++++++++++++++++++++++++++++++++++
 config.yaml                      |   1 +
 md5sum.txt                       |   5 +-
 setup.md                         |  55 ++++++++++++++-
 4 files changed, 202 insertions(+), 3 deletions(-)

What does this mean?

If you have source files that require output and figures to be generated (e.g. R Markdown), then it is important to make sure the generated figures and output are reproducible.

This output provides a way for you to inspect the output in a diff-friendly manner so that it's easy to see the changes that occur due to new software versions or randomisation.

⏱️ Updated at 2025-08-05 10:17:04 +0000