Workaround duplicates from get_xkcds

bot.py

@@ -1,5 +1,6 @@
 #!/usr/bin/env python
 # -*- coding: utf-8 -*-
+import asyncio
 from os import environ
 from collections import namedtuple
 from json import loads
@@ -79,11 +80,16 @@ async def inlinequery(event):
     """Handle the inline query."""
     # TODO show transcript in result but not message?
     builder = event.builder
-    await event.answer([builder.article(
+    result = await asyncio.gather(*(builder.article(
         title=xkcd.title,
         url=xkcd.link,
         text=MSG_FMT_STR.format(number=xkcd.number, link=xkcd.link, title=xkcd.title, alt=xkcd.alt)
-    ) for xkcd in get_xkcds(event.text)])
+    ) for xkcd in get_xkcds(event.text)))
+
+    # FIXME get_xkcds returns duplicates, which lead to the same result ID
+    #       Build a dict by their ID to remove the duplicates
+    result = list({r.id: r for r in result}.values())
+    await event.answer(result)
 
 
 def main():