Horizontal scroll bar doesn't go far enough to see end of line

Summary

With files having long lines of text that need a horizontal scroll bar to go the end of the line, the last few characters are missing/cut off

Environment

Can be replicated on Chrome, Firefox and Safari

Steps to Reproduce

1. Use the attached sample file to commit to a repository
2. Open it on the source or diff view

Expected Results

The entire line of the text should be visible using the scroll bar "Thequickbrownfoxjumpedoverthelazydog)"

Actual Results

The last few characters are cut off "Thequickbrownfoxjumpedoverthelazy"
 

Workaround

None