Fix trailing question mark being added for GET requests without parameters.

Author: LeWolfYT

src/pygbag/support/cross/aio/fetch.py

@@ -303,7 +303,10 @@ async def get(self, url, params=None, doseq=False):
         if self.is_emscripten:
             query_string = urlencode(params, doseq=doseq)
             await asyncio.sleep(0)
-            content = await platform.jsiter(platform.window.Fetch.GET(url + "?" + query_string))
+            if query_string == "":
+                content = await platform.jsiter(platform.window.Fetch.GET(url))
+            else:
+                content = await platform.jsiter(platform.window.Fetch.GET(url + "?" + query_string))
             if self.debug:
                 self.print(content)
             self.result = content