-// Only allow super admins on multisite to edit every user.
-if ( is_multisite() && ! current_user_can( 'manage_network_users' ) && $user_id != $current_user->ID && ! apply_filters( 'enable_edit_any_user_configuration', true ) )
+/**
+ * Filter whether to allow administrators on Multisite to edit every user.
+ *
+ * Enabling the user editing form via this filter also hinges on the user holding
+ * the 'manage_network_users' cap, and the logged-in user not matching the user
+ * profile open for editing.
+ *
+ * The filter was introduced to replace the EDIT_ANY_USER constant.
+ *
+ * @since 3.0.0
+ *
+ * @param bool $allow Whether to allow editing of any user. Default true.
+ */
+if ( is_multisite()
+ && ! current_user_can( 'manage_network_users' )
+ && $user_id != $current_user->ID
+ && ! apply_filters( 'enable_edit_any_user_configuration', true )
+) {