indent: add page

[staceybellerose]

• The page (if new), does not already exist in the repo.
• The page is in the correct platform directory (common/, linux/, etc.)
• The page has 8 or fewer examples.
• The PR title conforms to the recommended templates.
• The page follows the content guidelines.
• The page description includes a link to documentation or a homepage (if applicable).

Relates to #3689

[CLAassistant]

All committers have signed the CLA.

[navarroaxel]

Hey @staceybellerose Thanks for your submission, I left some comments.

Also, the docs say:

In the first form, one or more input files are specified. indent makes a backup copy of each file, and the original file is replaced with its indented version.

Could you please add an example with more than 1 file or the file of a specific directory? Is a space-separated list ?

[staceybellerose]

Hey @staceybellerose Thanks for your submission, I left some comments.

Also, the docs say:

In the first form, one or more input files are specified. indent makes a backup copy of each file, and the original file is replaced with its indented version.

Could you please add an example with more than 1 file or the file of a specific directory? Is a space-separated list ?

I've updated the first example to use the first form, with multiple files specified on the command line.

[staceybellerose]

When testing on my Mac, I noticed that it doesn't use the GNU version of indent, but the FreeBSD version, so that has been included as well.

[sbrl]

Wow, those are some pretty long lines, but in some cases it can't be helped.

Thanks, @staceybellerose!