update flag to -f

[dave-connors-3]

resolves #5878

Description

After some discussion with the great @b-per , the standard for shorthand command line flags is a dash followed by a single character, rather than multiple. This allows for chaining multiple shorthand flags together, and is considered best practice!

This PR updates the changes merged yesterday to follow this standard.

Supporting Links!

• Here!
• Click docs

I will miss -fr fr fr

Checklist

• [x] I have read the contributing guide and understand what's expected of me
• [x] I have signed the CLA
• [x] I have run this code in development and it appears to resolve the stated issue
• [ ] This PR includes tests, or tests are not required/relevant for this PR
• [x] I have opened an issue to add/update docs, or docs changes are not required/relevant for this PR
• x] I have run changie new to create a changelog entry