[wp-trac] [WordPress Trac] #50900: 5.5-RC3 - Code Editor Broken (change of behavior; Inserts br in content)

[WordPress Trac]

#50900: 5.5-RC3 - Code Editor Broken (change of behavior; Inserts br in content)
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 Reporter:  Justin_K      |      Owner:  (none)
     Type:  defect (bug)  |     Status:  new
 Priority:  normal        |  Milestone:  Awaiting Review
Component:  General       |    Version:
 Severity:  normal        |   Keywords:
  Focuses:                |
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 While testing out my plugins against 5.5, there has been a breaking change
 in the post editor: while in CODE EDITOR mode (note: not visual editor)
 mode, the instant the mouse focus is taken out of the content box, it
 appends <br /> tags at the end of every line.  This is expected with
 the visual editor, but not with the code editor.  The regression breaks
 the functionality of my plugin.

 Here's a short video showing the behavior:
 https://lnk2.tk/snaps/2020-08-11_11.31.07.mp4

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Ticket URL: <https://core.trac.wordpress.org/ticket/50900>
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