[wp-trac] [WordPress Trac] #65018: WordPress Post Edit Screen Content Overflow Issue in version 7.0 RC2

[WordPress Trac]

#65018: WordPress Post Edit Screen Content Overflow Issue in version 7.0 RC2
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 Reporter:  Pratik Jain              |       Owner:  (none)
     Type:  defect (bug)             |      Status:  new
 Priority:  normal                   |   Milestone:  Awaiting Review
Component:  Administration           |     Version:  trunk
 Severity:  normal                   |  Resolution:
 Keywords:  has-patch has-test-info  |     Focuses:  ui, css
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Comment (by gaisma22):

 == Patch Testing Report
 Patch Tested: https://github.com/WordPress/wordpress-develop/pull/11437

 === Environment
 - WordPress: 7.0-beta6-62085-src
 - PHP: 8.3.30
 - Server: nginx/1.29.7
 - Database: MySQL 8.4.8
 - Browser: Brave
 - OS: Ubuntu 24.04
 - Theme: Twenty Twenty-Five 1.4
 - MU Plugins: None
 - Plugins: Classic Editor 1.6.7

 === Steps Taken
 1. Went to Posts > Add New on the classic editor screen.
 2. Observed the layout below the page heading.
    **Before patch:** Content area overflows its container,
    visible as a red line on the left edge.
 3. Applied PR #11437 and hard refreshed.
    **After patch:** Red line gone. Layout looks correct.

 ✅ Patch is solving the problem

 === Expected Result
 The post edit screen content area should sit within its container with no
 horizontal overflow.

 === Additional Notes
 1. Bug confirmed on WordPress 7.0-beta6 on the classic
    post edit screen.
 2. Classic Editor plugin was required to reproduce the issue
    since the block editor does not show the same layout.


 === Screenshots/Screencast with results
 **Before Patch:**
 [[Image(https://i.ibb.co/x0Lp3Hw/before-overflow.png)]]

 **After Patch:**
 [[Image(https://i.ibb.co/tw1hvPJG/after-overflow.png)]]

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Ticket URL: <https://core.trac.wordpress.org/ticket/65018#comment:7>
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