Userscript - make specific long files in github online diff view shorter, since you don't need to check them.

git.user.js

// ==UserScript==
// @name    GitHub Suppress Diffs
// @version   2013.10.29
// @namespace   FET
// @description   Suppress style.css
// @include   http*://github.com/*
// ==/UserScript==

// Files to suppress:
suppressFiles([
  "telerik/css/style.css",
  "documentation/styles/css/theme.css"
]);

// Call resize on the specified files:
function suppressFiles(path){
  for (var url in path) {
    resizeDiff(document.querySelector('.meta[data-path="' + path[url] + '"]').nextElementSibling);
  }
}

// Resize the diff area in github:
function resizeDiff(obj) {
    obj.style.height = "200px";
    obj.style.overflow = "auto";
}