old_contents: // ==UserScript==  
  // @name        Hide some URLs
  // @namespace   https://github.com/jamesjonesmath/canvancement  
  // @description Hide the URL links within a "hide_url" class when printing a page
  // @include     https://*.instructure.com/courses/*/pages/*  
  // @version     1  
  // @grant       GM_addStyle  
  // ==/UserScript==  
  GM_addStyle('@media print { .hide_url a:link:after, .hide_url a:visited:after { content: none; }}');
  
new_contents: // ==UserScript==  
  // @name        Hide some URLs
  // @namespace   https://github.com/jamesjonesmath/canvancement  
  // @description Hide the URL links within a "hide_url" class when printing from within Canvas
  // @include     https://*.instructure.com/*
  // @version     1  
  // @grant       GM_addStyle  
  // ==/UserScript==  
  GM_addStyle('@media print { .hide_url a:link:after, .hide_url a:visited:after { content: none; }}');
  
subject: Update hide-some-urls.user.js