Line numbers do not align with code

Summary

The line numbers in the code viewer do not match up to the lines of code

Steps to reproduce

Using Chrome, view any code file in a repository on GitLab.com and inspect the line numbers. Additionally, look at a long code file. The line numbers will stop well before the end of the file.

What is the current bug behavior?

The line numbers are 18.4 pixels tall, whereas each line of code is 19 pixels tall.

What is the expected correct behavior?

The line numbers and code should match.

Relevant logs and/or screenshots

In the above screenshot, the dev tools have the final line number selected (551). Observe that this is noticeably above the actual final line (which is highlighted).

Output of checks

This bug happens on GitLab.com

Results of GitLab environment info

This bug happens on GitLab.com

Results of GitLab application Check

This bug happens on GitLab.com

Possible fixes

I don't know where the CSS file is, but this would fix it:

.file-content.code .line-numbers a {
    height: 19px;
}