Get the Revision History (originally written by Kevin Kevinson)

gistfile1.js

// ==UserScript==
// @name        revision viewer
// @namespace   about:blank
// @description Adds a "revisions" button to SO's post menu
// @include     http://stackoverflow.com/questions/*
// @version     1
// @grant       none
// ==/UserScript==
 
var url = document.URL;
var target = url.slice(0, url.lastIndexOf("/")).replace("questions", "posts") + "/revisions";
 
var menu = document.getElementsByClassName("post-menu")[0]
 
var sep = document.createElement("span");
sep.className = "lsep";
sep.innerHTML = "|";
menu.appendChild(sep);
 
var link = document.createElement("a");
link.innerHTML = "revisions";
link["href"] = target;
menu.appendChild(link);