Sync trunk/ with staging branch. **Stable Tag 2.5.10**

branches/staging/ is most up-to-date: 2.5.11d2.
Per WordPress guideline, “trunk/ should contain the latest version of your code, even if that version is a beta.”
See https://developer.wordpress.org/plugins/wordpress-org/how-to-use-subversion/#use-the-trunk-folder-for-code
= Moved files =
Two documentation files are moved from development/ to the root folder:
- customized-template-stack.txt
- customized-documentation-schema.txt
= Deleted files and folders =
Part of the tooling and the duplicate license were mistakenly included and are now removed from distribution:
- development/csscat.sh
- contrib/pre-commit
- composer.json
- composer.lock
- LICENSE
The comments shall be updated accordingly.
development/csscat.sh is now _tools/build-stylesheets.sh, available in Footnotes’ GitHub repo.

git-svn-id: https://plugins.svn.wordpress.org/footnotes/trunk@2495062 b8457f37-d9ea-0310-8a92-e5e31aec5664

class/convert.php

@@ -1,4 +1,4 @@
-<?php
+<?php // phpcs:disable WordPress.Files.FileName.InvalidClassFileName
 /**
  * Includes the Convert Class.
  *