See sneaky punctuation links

sneaky_links.user.js

// ==UserScript==
// @name		See sneaky punctuation links
// @version		1.2
// @namespace   https://gist.github.com/The-Quill/a9c83993fe585e4f9fe9059081727629/raw/3038e3d8028d32c220821e1d7d89b093d140a136/sneaky_links.user.js
// @description	See sneaky punctuation links
// @author		Quill
// @match *://meta.stackexchange.com/questions/*
// @match *://*.stackexchange.com/questions/*
// @match *://stackoverflow.com/questions/*
// @match *://serverfault.com/questions/*
// @match *://superuser.com/questions/*
// @match *://askubuntu.com/questions/*
// @match *://meta.*.stackexchange.com/questions/*
// ==/UserScript==

var links = document.querySelectorAll('.post-text a');
Array.from(links).forEach(function(link){
    var text = link.textContent.replace(/[.,\/#!$%\^&\*;:{}=\-_`~()]/g, "");
    if (text.length <= 1 && isNaN(text)){
        link.style.backgroundColor = "red";
        link.style.padding = "5px";
        link.style.color = "white";
    }
});