OPML Import Failure: Processing instructions must not start with xml

Checklist

[x] I am using the latest version
[x] I checked, but didn't find any duplicates (open OR closed) of this issue in the repo.
[x] This issue contains only one bug. I will open one issue for every bug report I want to file.

Steps to reproduce the bug

Import the following OPML file:

<?xml version="1.0" encoding="UTF-8"?>
<opml version="1.1">
  <head>
    <title>
      Feeder
    </title>
  </head>
  <body>
    <outline title="Loper OS" text="Loper OS" type="rss" xmlUrl="http://www.loper-os.org/?feed=rss2"/>
  </body>
</opml>

Actual behavior

News fails with the following error message: -- Processing instructions must not start with xml (position:unknown @3:1 in java.io.InputStreamReader@3b727a2).

Expected behavior

The feed is correctly imported. As far as I can see, line 3 looks like this:

<?xml version="1.0" encoding="UTF-8"?><rss version="2.0"
    xmlns:content="http://purl.org/rss/1.0/modules/content/"
...

Having <?xml...?> be directly followed by a tag (rather than a newline character) seems unorthodox to me, although I'm not certain this is illegal. Could that be the source of the problem?

Device info

Android version/Custom ROM version: Stock android 13.
Device model: Pixel 4A.

bubelov / news

OPML Import Failure: Processing instructions must not start with xml #176

Checklist

Steps to reproduce the bug

Actual behavior

Expected behavior

Device info