Revision changes view is cutting off text #610

Environment

• BookStack Version: v0.18.5
• PHP Version: 7.1.12
• MySQL Version: 5.7.20
• app-editor: markdown
• Other: local setup via valet

Current Behavior

The attached screenshot is from books/foo/page/bar/revisions and is only showing a few characters from each line.

Steps to Reproduce

1. Create a book -> chapter -> page
2. Add content and save
3. Make an edit
4. From the page go to More -> Revisions and click Changes for the edit

Potentially related

• I think I created this blank page in wysiwyg mode, enabled markdown, and then added content and made edits... although I'm not certain nor know if this is related.