Gelbooru bridge double encodes URLs

[ghost]

Using the Gelbooru bridge, the generated (Atom, JSON, Mrss, plaintext) feeds contain double encoded URLs for tags.

Example:

<entry>
		<title type="html">Gelbooru | 4874400</title>
		<published>2019-08-17T12:02:28+00:00</published>
		<updated>2019-08-17T12:02:28+00:00</updated>
		<id>http://gelbooru.com/index.php?page=post&amp;amp;s=view&amp;amp;id=4874400&amp;tags=1girl</id>
		<link rel="alternate" type="text/html" href="http://gelbooru.com/index.php?page=post&amp;amp;s=view&amp;amp;id=4874400&amp;tags=1girl"/>
		
		<content type="html">&lt;a href="http://gelbooru.com/index.php?page=post&amp;amp;s=view&amp;amp;id=4874400&amp;tags=1girl"&gt;&lt;img src="https://gelbooru.com/thumbnails/f3/4e/thumbnail_f34e6e5bf0a3e9e84a326cccba6b0e65.jpg" /&gt;&lt;/a&gt;&lt;br&gt;Tags:  1girl bangs bare_shoulders black_sailor_collar blonde_hair blouse blue_background blush breasts collarbone commentary_request earmuffs eyebrows_visible_through_hair gradient gradient_background hair_between_eyes looking_at_viewer medium_breasts neck_ribbon open_mouth petals pointy_hair purple_neckwear purple_ribbon ribbon sailor_collar short_hair sleeveless sleeveless_blouse smile solo syuri22 touhou toyosatomimi_no_miko upper_body white_background yellow_eyes </content>
	</entry>

To Reproduce
Steps to reproduce the behavior:

1. Activate the Gelbooru bridge.
2. Create any feed (e.g. page 1, tag '1girl').
3. Select "Atom" as format.
4. Inspect the contents of the first s "id".

Expected behavior
The 's id contains a valid URL, encoded for XML.
Query parameters are encoded as

&key=value

, not as

&key=value

when inspecting the file in a text editor.

Desktop (please complete the following information):

• OS: ubuntu 18.04 LTS
• PHP Version 7.3.8