Add multiple username match message on unban, fix len(filter) error

jarvis/cogs/admin.py

@@ -195,12 +195,26 @@ class AdminCog(commands.Cog):
                     bans,
                 )
             else:
-                results = filter(lambda x: x.user.name == user, bans)
+                results = [
+                    x for x in filter(lambda x: x.user.name == user, bans)
+                ]
                 if results:
                     if len(results) > 1:
-                        # TODO: send list of bans that matched
-                        # for admins to use on next attempt
-                        pass
+                        active_bans = []
+                        for ban in bans:
+                            active_bans.append(
+                                "{0} ({1}): {2}".format(
+                                    ban.user.name, ban.user.id, ban.reason
+                                )
+                            )
+                        message = (
+                            "More than one result. "
+                            + "Please use one of the following IDs:\n```"
+                            + "\n".join(active_bans)
+                            + "\n```"
+                        )
+                        await ctx.send(message)
+                        return
                     else:
                         discord_ban_info = results[0]
 
@@ -308,7 +322,7 @@ class AdminCog(commands.Cog):
                 user = await self.bot.fetch_user(ban["user"])
                 ban["username"] = user.name if user else "[deleted user]"
             ban_messages.append(
-                "[{0}] {1} ({2}): {3}\n".format(
+                "[{0}] {1} ({2}): {3}".format(
                     ban["time"].strftime("%d-%m-%Y"),
                     ban["username"],
                     ban["user"],