Touch up documentation for phpcs locally

[rosiel]

Purpose / why: #1620

There was worry that phpcs was out of sync between travis and local setups. I verified (to the best of my knowledge without running an actual PR) that there is documentation for running phpcs locally, and that (and how!) it matches what's running in Travis.

What changes were made?

• Put the specific excludes/filetype options in the main code examples
• Simplified the examples (removed repeated references to the drupal root folder vs the drupal web folder)
• Was explicit about how this is installed like this in Vagrant and installing on other systems may vary.

Verification

Does it match? Also, is there more (about doing this in ISLE) that needs to be included?

Interested Parties

Replace this text - Name some folks who may be interested, if documentation related mention @Islandora/documentation, or, if unsure, @Islandora/8-x-committers

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Checklist

Pull-request reviewer should ensure the following

• Does this PR link to related issues?
• Does the proposed documentation align with the Islandora Documentation Style Guide?
• Are the changes accurate, useful, free of typos, etc?
• Does this PR update the last updated on date on the documentation page?

Person merging should ensure the following

• Does mkdocs still build successfully? (This is indicated by TravisCI passing. To test locally, and see warnings, see How To Build Documentation.)
• If pages are renamed or removed, have all internal links to those pages been fixed?
• If pages are added, have they been linked to or placed in the menu?
• Did the PR receive at least one approval from a committer, and all issues raised have been addressed?

[elizoller]

This is a helpful bit of documentation if you're not using the ansible stuff

[elizoller]

we also use the DrupalPractice library

[rosiel]

@elizoller I thought i knew what you meant but I'm not sure that I do!

In https://github.com/Islandora/islandora_ci/blob/main/travis_scripts.sh we run two commands: phpcs --standard=Drupal and phpcpd. The second one looks to me to be a "copy paste detector".

Looking into Drupal's docs on PHP CodeSniffer CommandLine Usage, they mention "Check Drupal Best Practices" with the example phpcs --standard=DrupalPractice.

I don't see where we actually run this in our code checks. From my knowledge, what's in travis_scripts.sh in the islandora_ci library is the code check that applies to all our repos.

@dannylamb or @whikloj might also know?

[manez]

@rosiel we reviewed this in DIG and wanted to ask if you still wanted to keep working on this one, given that it's pending requested changes and @elizoller is no longer active?