remove extra comma in pfx invalid input handler

CHANGELOG.md

@@ -21,6 +21,7 @@ The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.0.0/).
 - Fixed ditto marks (") appearing in the ae7q call command.
 - Fixed issue where incorrect table was parsed in ae7q call command.
 - Fixed warning emoji reaction on messages starting with "??".
+- Fixed issue where `prefixes` would error when given an invalid argument.
 
 
 ## [2.1.0] - 2020-01-04

exts/ham.py

@@ -74,8 +74,8 @@ class HamCog(commands.Cog):
             return
         embed = cmn.embed_factory(ctx)
         if country.lower() not in callsign_info.options:
-            embed.title = f"{country} not found!",
-            embed.description = f"Valid countries: {', '.join(callsign_info.options.keys())}",
+            embed.title = f"{country} not found!"
+            embed.description = f"Valid countries: {', '.join(callsign_info.options.keys())}"
             embed.colour = cmn.colours.bad
         else:
             embed.title = callsign_info.options[country.lower()][0]