Jinja render text in HTML preserving line breaks

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All whitespace, including newlines, is turned into a single space in HTML.

Your options, from best to worst:

  1. Put white-space: pre-wrap; on the containing element. This tells HTML to show all whitespace exactly as it appears in the source, including newlines. (You could also use a <pre> tag, but that will also disable word-wrapping, which you probably don’t want.)
  2. Treat the plain text as Markdown and throw a Markdown processor at it—one of the things Markdown does is wrap paragraphs in <p>.
  3. In Python-land, do .replace('\n', '<br>'). But this leaves you vulnerable to XSS because there might be other HTML-like junk in the string, and fixing that is a bit of a pain.

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