Gap between navigation bar and floating file headers on commit page

Summary

On commit page there is a gap between navigation bar and floating file headers.

Steps to reproduce

  • go to any commit page
  • scroll down

What is the current bug behavior?

gap between navigation bar and floating file header:

floating-file-header

What is the expected correct behavior?

no gap

Possible fixes

The top margin probably needs to be adjusted for the commit page.