[ekamran]

The "Load more" count in the Media Library showed __( 'Showing %1$s of %2$s media items' ). The English string is always plural, so a library with one media item showed "Showing 1 of 1 media items", and translators had a single form for every count. Its translators comment sat above sprintf() instead of the translation call, so make-pot did not extract it.

This uses _n(), with the plural form following the total, and moves the comment directly above the _n() call. make-pot now extracts the comment and both forms, from browser.js and from the built wp-includes/js/media-views.js. Existing translations of the old string do not carry over to the new pair.

Adds a QUnit test (test-attachments-browser.js) that runs updateLoadMoreView() for one of one and one of two media items and checks the text. It fails on trunk and passes with the change. The suite wraps each test in fake timers, but updateLoadMoreView() is an underscore debounce that measures its wait with the real Date.now(), so the test switches to real timers, cancels any pending call and runs one update at a time.

Tested in a browser on WordPress 7.1.3, whose updateLoadMoreView() is identical to trunk, with infinite scrolling turned off in the user profile (the count only shows then): one media item now shows "Showing 1 of 1 media item", two show "Showing 2 of 2 media items".

Trac ticket: https://core.trac.wordpress.org/ticket/66357

Use of AI Tools

AI assistance: Yes
Tool(s): Claude Code and Codex
Used for: Investigation, implementation, QUnit test, browser verification, and PR wording. I reviewed the reasoning and test results, and I take responsibility for the contribution.

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This Pull Request is for code review only. Please keep all other discussion in the Trac ticket. Do not merge this Pull Request. See GitHub Pull Requests for Code Review in the Core Handbook for more details.

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