Cleaned linting errors and inlined regex test

Author: jtsuyuki

lib/html.js

@@ -63,8 +63,7 @@ helpers.css = function(list, options) {
     var ext = path.extname(item);
     var fp = item;
 
-    var isExternal =  /(^\/\/)|(:\/\/)/.test(item);
-    if(!isExternal) {
+    if (!/(^\/\/)|(:\/\/)/.test(item)) {
       fp = path.posix.join(assets, item);
     }
 

test/html.js

@@ -39,7 +39,7 @@ describe('html', function() {
     });
 
     it('should not use options.assets when passing in an absolute url', function() {
-      var actual = hbs.compile('{{{css "https://abc.com/bar.css"}}}')({options: {assets: "foo"}});
+      var actual = hbs.compile('{{{css "https://abc.com/bar.css"}}}')({options: {assets: 'foo'}});
       assert.equal(actual, '<link type="text/css" rel="stylesheet" href="https://abc.com/bar.css">');
     });