Mentioned in [25952] on Core SVN:
Inline documentation for hooks in wp-admin/network/site-settings.php.

Mentioned in [25950] on Core SVN:
Inline documentation for hooks in wp-includes/functions.wp-styles.php.

Created ticket #25726 on Core Trac:
Hooks Docs: wp-admin/user-edit.php & 2 more files

Created ticket #25725 on Core Trac:
Hooks Docs: wp-admin/network/site-settings.php

Created ticket #25722 on Core Trac:
Hooks Docs: wp-includes/functions.wp-styles.php