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Changes between Initial Version and Version 1 of Ticket #58361, comment 3

initial	v1
9	9	> Looking deeper into the intent behind `wp-admin/menu-header.php`'s check for `none` or `div` (see r21877), it seems these values were to be assigned internally by `wp-admin/menu.php` in the case that `menu_icon` was null. That behavior has since evolved to [https://developer.wordpress.org/reference/functions/register_post_type/#menu_icon display the default posts icon].
10	10
11		The intention was to include an icon from Goole material icons via css ~~using by passing the "none" option as documented here:~~ https://developer.wordpress.org/reference/functions/register_post_type/#parameters but it does not work. Rather than emitting and empty div, it emits `<img src="http://none" alt="">`
	11	The intention was to include an icon from Goole material icons via css by passing the "none" option as documented here: (see the `menu_icon` parameter) https://developer.wordpress.org/reference/functions/register_post_type/#parameters but it does not work. Rather than emitting and empty div, it emits `<img src="http://none" alt="">`
12	12
13	13	This is because `$menu_icon` is escaped with `esc_url`, so when checking to see if it is equal to `'none'`, this check fails