[wp-trac] [WordPress Trac] #40191: Multiline post content with `<` as first character becomes malformed

[WordPress Trac]

#40191: Multiline post content with `<` as first character becomes malformed
-----------------------------+-----------------------------
 Reporter:  johnjamesjacoby  |      Owner:
     Type:  defect (bug)     |     Status:  new
 Priority:  normal           |  Milestone:  Awaiting Review
Component:  Formatting       |    Version:
 Severity:  normal           |   Keywords:
  Focuses:                   |
-----------------------------+-----------------------------
 Create a page/post with the following content:

 {{{
 < Hello
 < Hello
 < Hello
 }}}

 View the post, and `post_content` becomes:

 {{{
 < Hello < Hello < Hello
 }}}

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Ticket URL: <https://core.trac.wordpress.org/ticket/40191>
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