Merge pull request #10519 from gschlager/get-url

Fixes for getURL() in subfolders and basePath in translations

test/javascripts/lib/get-url-test.js

@@ -61,6 +61,12 @@ QUnit.test("getURL on subfolder install", assert => {
     "relative url has subfolder"
   );
 
+  assert.equal(
+    getURL(""),
+    "/forum",
+    "relative url has subfolder without trailing slash"
+  );
+
   assert.equal(
     getURL("/svg-sprite/forum.example.com/svg-sprite.js"),
     "/forum/svg-sprite/forum.example.com/svg-sprite.js",