[wp-trac] [WordPress Trac] #42971: Page editor (TinyMCE) strips preformatted code entered inside <pre><code> tags.

[WordPress Trac]

#42971: Page editor (TinyMCE) strips preformatted code entered inside <pre><code>
tags.
--------------------------+-----------------------------
 Reporter:  Sakis         |      Owner:
     Type:  defect (bug)  |     Status:  new
 Priority:  normal        |  Milestone:  Awaiting Review
Component:  TinyMCE       |    Version:  4.9.1
 Severity:  normal        |   Keywords:
  Focuses:                |
--------------------------+-----------------------------
 Edit some page or post
 Switch editor to text
 Enter the following snippet


 {{{
 <pre>
 <code>
 /* Just for testing purposes */

 #include <stdio.h>

 main()
 {
     printf("Hello World");
 }
 </code>
 </pre>
 }}}

 Save, publish or switch to visual
 Voila, "<stdio.h>" part is stripped out from both visual editor and page
 when rendered.

 PS: Tested with clean installed WP, no plugins or third party themes, with
 Chrome, Edge and Safari browsers in Win10 and MacOS X

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Ticket URL: <https://core.trac.wordpress.org/ticket/42971>
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