Merge branch 'long-commit-message-scroll-fix' into 'master'

Fix long commit message scroll issue.

Fixes horizontal scrollbar for long commit description.

## Before
![before_](/uploads/d261e26044d8ab451bc7768b16316253/before_.png)

## After
![after](/uploads/f27227a77d25d80b797e3ffc916d1957/after.png)

See merge request !4643

CHANGELOG

@@ -29,6 +29,7 @@ v 8.9.0 (unreleased)
   - Redesign navigation for project pages
   - Added shortcut 'y' for copying a files content hash URL #14470
   - Fix groups API to list only user's accessible projects
+  - Fix horizontal scrollbar for long commit message.
   - Add Environments and Deployments
   - Redesign account and email confirmation emails
   - Don't fail builds for projects that are deleted

app/assets/stylesheets/pages/commits.scss

@@ -120,6 +120,7 @@
       background: inherit;
       padding: 0;
       margin: 0;
+      white-space: pre-wrap;
     }
 
     a {