completion/laravel: simplify code flow

[gaelicWizard]

Description

Apply shfmt, fix shellcheck, and simplify code flow by short-circuiting at the top rather than indenting the whole function definition in an if clause.

Motivation and Context

Just cleaning up.

How Has This Been Tested?

Types of changes

• Bug fix (non-breaking change which fixes an issue)

Checklist:

• My code follows the code style of this project.
• If my change requires a change to the documentation, I have updated the documentation accordingly.
• I have read the CONTRIBUTING document.
• If I have added a new file, I also added it to clean_files.txt and formatted it using lint_clean_files.sh.
• I have added tests to cover my changes, and all the new and existing tests pass.

[davidpfarrell]

Another @tbhaxor file, but we didn't break this one in a previous commit.

Converting to a proper array and using quoted reference is a good fix imo, so that part is approved.

However:

@gaelicWizard You're using ' in the array on this PR but " on the wpscan PR - Let's settle on one (I like ')

[gaelicWizard]

using ' in the array on this PR but " on the wpscan PR - Let's settle on one (I like ')

I alsö like ' for this, but the string was already " so I just left it out of laziness. I'll switch it now

[davidpfarrell]

Best I can tell this is ready to go !