Add a checkbox to the Github Compare screen to ignore white space. Add this to tampermonkey

ignore-whitespace.js

// ==UserScript==
// @name         Github Whitespace
// @namespace    http://deecewan.com/
// @version      0.1
// @description  Add a checkbox to the Github Compare screen to ignore white space.
// @author       David Buchan-Swanson
// @match        https://github.com/*/*/compare/*
// @grant        none
// ==/UserScript==

(function() {
    'use strict';
    // the element to append to
    let rangeEditor = document.querySelector('.range-editor');

    const checked = window.location.search.includes('w=1');

    const label = document.createElement('label');
    label.innerText = "Ignore Whitespace?";
    const checkbox = document.createElement('input');
    checkbox.type = "checkbox";
    checkbox.checked = checked;
    checkbox.style.marginRight = '5px';
    label.prepend(checkbox);
    rangeEditor.append(label);

    checkbox.addEventListener('change', (e) => {
        if (e.target.checked) {
            window.location.search = window.location.search ? window.location.search.concat('&w=1') : '?w=1';
        } else {
            window.location.search = window.location.search.replace('w=1', '');
        }
    });
})();