All Octicons
file-diff
Octicon sizes navigation
React
import {FileDiffIcon} from '@primer/octicons-react' <FileDiffIcon size={24} />
Rails
<%= render(Primer::Beta::Octicon.new(:"file-diff", size: :medium)) %>
Jekyll
{% octicon file-diff height:24 %}
Figma
This icon is called file-diff-24 in Primer's Octicons library.