Update 02-filedir.md

[gmfricke]

I noticed that later there are references to the filesystem tree with no explanation of why we should think of this as a tree. There are also references to the root directory. I added a very brief explanation that will hopefully take out part of the mystery for people new to the shell.

[github-actions[bot]]

Thank you!

Thank you for your pull request :smiley:

:robot: 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:

• :dart: correct output
• :framed_picture: correct figures
• :question: new warnings
• :bangbang: new errors

Rendered Changes

:mag: Inspect the changes: https://github.com/swcarpentry/shell-novice/compare/md-outputs..md-outputs-PR-1397

The following changes were observed in the rendered markdown documents:

 02-filedir.md | 3 ++-
 md5sum.txt    | 2 +-
 2 files changed, 3 insertions(+), 2 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.

:stopwatch: Updated at 2023-06-18 06:45:52 +0000

[bkmgit]

Thanks for the contribution. Can you make the lines shorter so that they are at most 80 characters long.

[bkmgit]

Thanks for the contribution. Please make pull requests with further changes if needed.