Add explanation for committing multiple files

[erinmgraham]

Explain the concept of committing multiple files together as a single logical improvement in Git and its advantage over word processors. Closes Issue #1100

[github-actions]

Thank you!

Thank you for your pull request 😃

🤖 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/swcarpentry/git-novice/compare/md-outputs..md-outputs-PR-1101

The following changes were observed in the rendered markdown documents:

 04-changes.md | 4 ++++
 md5sum.txt    | 2 +-
 2 files changed, 5 insertions(+), 1 deletion(-)

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 2025-11-26 00:00:44 +0000

[erinmgraham]

Self‑merging this one so we can move things forward. Please feel free to review later and suggest any improvements.