Why scriptSource is useful in greasemonkey (https://github.com/greasemonkey/greasemonkey/pull/1738)

coffee.user.js

// ==UserScript==
// @name      CoffeeTest
// @namespace test
// @version   0.1
// @grant     none
// @require   http://jashkenas.github.io/coffee-script/extras/coffee-script.js
// @match     http://example.iana.org/
// ==/UserScript==

/*
======================INLINE_RESOURCE_BEGIN======================

***********RESOURCE_START=COFFEE*************

make_css = (css) ->
    elt = document.createElement 'style'
    elt.type = 'text/css'
    elt.textContent = css
    elt

myStyle = make_css resource['someCSS']

document.head.appendChild myStyle

*************RESOURCE_END*************

*************RESOURCE_START=someCSS*************

h1 {
    color: red;
}
a {
    font-size: 20px;
}

*************RESOURCE_END*************

======================INLINE_RESOURCE_END======================
*/

function getInlineResources() {
    var resource = {}, len, match, resourceBlocks,
        inlineResourcesMatch = (/^=+INLINE_RESOURCE_BEGIN=+$([\s\S]*?)^=+INLINE_RESOURCE_END=+$/m).exec(GM_info.scriptSource);

    resourceBlocks = (inlineResourcesMatch && inlineResourcesMatch[1].match(/^\**RESOURCE_START[\s\S]*?^\**RESOURCE_END\**$/mg)) || null;

    len =            (resourceBlocks       && resourceBlocks.length) || 0;
    
    for (var i = 0; i < len; i++) {
        match = (/^\**RESOURCE_START=(.*?)\**$\s*^([\s\S]*)^\**RESOURCE_END\**$/m).exec(resourceBlocks[i]);
        resource[match[1]] = match[2];
    }

    return resource;
}

var resource = getInlineResources();

this.CoffeeScript.eval(resource['COFFEE']);