Github Commit Whitespace

Adds button to hide whitespaces from commit
Wrap lines
// ==UserScript==
// @name             Github Commit Whitespace
// @namespace        https://github.com/jerone/UserScripts
// @description      Adds button to hide whitespaces from commit
// @author           jerone
// @copyright        2014+, jerone (https://github.com/jerone)
// @license          CC-BY-NC-SA-4.0; https://creativecommons.org/licenses/by-nc-sa/4.0/legalcode
// @license          GPL-3.0-or-later; http://www.gnu.org/licenses/gpl-3.0.txt
// @homepage         https://github.com/jerone/UserScripts/tree/master/Github_Commit_Whitespace
// @homepageURL      https://github.com/jerone/UserScripts/tree/master/Github_Commit_Whitespace
// @supportURL       https://github.com/jerone/UserScripts/issues
// @contributionURL  https://www.paypal.com/cgi-bin/webscr?cmd=_s-xclick&hosted_button_id=VCYMHWQ7ZMBKW
// @icon             https://github.githubassets.com/pinned-octocat.svg
// @include          https://github.com/*
// @version          1.5.4
// @grant            none
// ==/UserScript==
 
// cSpell:ignore tooltipped, diffbar
 
(function () {
	function addButton() {
		var e;
		if (
			(/\/commit\//.test(location.href) ||
				/\/compare\//.test(location.href)) &&
			(e = document.getElementById("toc"))
		) {
			let r = e.querySelector(".GithubCommitWhitespaceButton");
			if (r) {
				r.parentElement.removeChild(r);
			}
 
			let on = /w=/.test(location.search); // Any occurrence results in enabling
 
			let b = e.querySelector(".toc-diff-stats");
 
			let a = document.createElement("a");
			a.classList.add("btn", "btn-sm", "tooltipped", "tooltipped-n");
			if (on) {
				a.classList.add("selected");
			}
			a.setAttribute("href", url(on));
			a.setAttribute("rel", "nofollow");
			a.setAttribute(
				"aria-label",
				on ? "Show commit whitespace" : "Hide commit whitespace",
			);
			a.appendChild(document.createTextNode("\u2423"));
 
			let g = document.createElement("div");
			g.classList.add("GithubCommitWhitespaceButton", "float-right");
			g.style.margin = "0 10px 0 0"; // Give us some room
			g.appendChild(a);
 
			b.parentNode.insertBefore(g, b);
		} else if (
			/\/pull\/\d*\/(files|commits)/.test(location.href) &&
			(e = document.querySelector(
				"#files_bucket .pr-toolbar .diffbar > .pr-review-tools",
			))
		) {
			let r = e.querySelector(".GithubCommitWhitespaceButton");
			if (r) {
				r.parentElement.removeChild(r);
			}
 
			let on = /w=/.test(location.search); // Any occurrence result in enabling
 
			let a = document.createElement("a");
			a.classList.add(
				"btn",
				"btn-sm",
				"btn-outline",
				"tooltipped",
				"tooltipped-s",
			);
			a.setAttribute("href", url(on));
			a.setAttribute("rel", "nofollow");
			a.setAttribute(
				"aria-label",
				on ? "Show commit whitespace" : "Hide commit whitespace",
			);
			a.appendChild(document.createTextNode("\u2423"));
 
			let g = document.createElement("div");
			g.classList.add("GithubCommitWhitespaceButton", "diffbar-item");
			g.appendChild(a);
 
			e.insertBefore(g, e.firstChild);
		}
	}
 
	function url(on) {
		var searches = location.search
			.replace(/^\?/, "")
			.split("&")
			.filter(function (item) {
				return item && !/w=.*/.test(item);
			});
		if (!on) {
			searches.push("w=1");
		}
		return (
			location.href
				.replace(location.search, "")
				.replace(location.hash, "") +
			(searches.length > 0 ? "?" + searches.join("&") : "") +
			location.hash
		);
	}
 
	// Init
	addButton();
 
	// Pjax
	document.addEventListener("pjax:end", addButton);
})();
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