Preserve newlines and indentation in <pre> tags from RSS import

[tudorpavel]

What type of PR is this? (check all applicable)

• Refactor
• Feature
• Bug Fix
• Optimization
• Documentation Update

Description

I tracked down the issue to the reverse_markdown gem and found this unmerged fix: xijo/reverse_markdown#78. Since it seems we are already overriding the <pre> converter I went ahead and added the fix to our CustomPre implementation, together with a simple spec.

Related Tickets & Documents

Closes #10104

QA Instructions, Screenshots, Recordings

I tested using the sample RSS feed provided in the issue.

The easiest way I found for me to test the feed parsing was to create a draft Article and then from rails console perform an update with the code from RssReader:

feed = Feedjira.parse(File.read('sample_rss.xml'))

Article.last.update(
  body_markdown: RssReader::Assembler.call(feed.entries.first, User.find(4), feed, feed.entries.first.url.strip.split("?source=")[0])
)

Added tests?

• yes
• no, because they aren't needed
• no, because I need help

Added to documentation?

• docs.forem.com
• readme
• no documentation needed