Removed the value attribute from the empty config which removed attributes when they are an empty string, but in the case of input type radio and checkbox, the default value is "on".

Author: hexydec

src/htmldoc/htmldoc.php

@@ -75,7 +75,7 @@ class htmldoc {
 					'type' => 'text'
 				]
 			],
-			'empty' => ['id', 'class', 'style', 'title', 'action', 'value', 'alt', 'lang', 'dir', 'onfocus', 'onblur', 'onchange', 'onclick', 'ondblclick', 'onmousedown', 'onmouseup', 'onmouseover', 'onmousemove', 'onmouseout', 'onkeypress', 'onkeydown', 'onkeyup'], // attributes to remove if empty
+			'empty' => ['id', 'class', 'style', 'title', 'action', 'alt', 'lang', 'dir', 'onfocus', 'onblur', 'onchange', 'onclick', 'ondblclick', 'onmousedown', 'onmouseup', 'onmouseover', 'onmousemove', 'onmouseout', 'onkeypress', 'onkeydown', 'onkeyup'], // attributes to remove if empty
 			'urls' => ['href', 'src', 'action', 'poster'], // attributes to minify URLs in
 			'urlskip' => [
 				'link' => [