Inconsistency in the use of text cases in the WordPress dashboard

[aravindajith]

There seems to be a serious inconsistency in following the use of a standardized test case across the WordPress dashboard. The inconsistency has been observed in form labels, titles, and buttons. Sharing some screenshots as attachments.

[aravindajith]

Settings > Writing

[aravindajith]

Tools > Plugin File Editor - Buttons text are inconsistent

[aravindajith]

Settings > General - The last label is capitalized - Expected 'On' to be in small case (Week Starts on) as most other labels were following title case

[aravindajith]

Settings > Discussion

[aravindajith]

Settings > Privacy

Trac ticket: https://core.trac.wordpress.org/ticket/57226

### About Privacy Settings Screen

There are a few use case:

• When referring to the Privacy Policy page, "Privacy Policy" should probably use capitalization on "Privacy Policy", but "page" should remain lowercase
• When referring to the fact that a website needs, let's say "a relevant privacy policy", I'd says that "privacy policy" should stay lowercase.

This PR also updates other small capitalization issues.
What do you think?

[audrasjb]

In 54897:

Coding Standards: Use consistent markup for line break tags on update-core.php.

This changeset replaces <br/> with <br /> on various places, as per WordPress Coding Standards.
See ​https://developer.wordpress.org/coding-standards/wordpress-coding-standards/html/#self-closing-elements

Follow-up to [54062].

Props rajanpanchal2028, alberuni-azad, sabernhardt.
Fixes #57226.
See #56791.

[audrasjb]

Wrong commit assignment, sorry. Reopening.

[sarath.ar]

Site health page also have same issue, attached screenshot for reference

[nithi22]

Patch that will convert all the settings labels to Title Case.

[costdev]

I'm not sure I'd like changing the settings screens to use Title Case, particularly with results like:

Create A New Privacy Policy Page

This seems a little much to me, and I'd personally prefer sentence case:

Create a new privacy policy page

Or, if "privacy policy" is assumed to be the name of the new page, then:

Create a new Privacy Policy page

---

On the Site Health page:

1 critical issue
3 recommended improvements

These aren't actually "small case" as noted in the screenshot above. "1" and "3" are the start of each of these sentences, so it's valid sentence case.

[audrasjb]

Moving for 6.2 consideration.

[audrasjb]

In 55082:

Administration: Use a consistent capitalization in Privacy Policy related strings.

This changeset fixes a few use case:

• When referring to the Privacy Policy page, "Privacy Policy" should use capitalization on "Privacy Policy", but "page" should remain lowercase;
• When referring to the fact that a website needs, let's say "a relevant privacy policy", "privacy policy" should stay lowercase.

This changeset also updates other small capitalization issues.

Props aravindajith, audrasjb, sarathar, nithi22, costdev.
Fixes #57226.

https://core.trac.wordpress.org/changeset/55082