Sort output and append final newline

bin/rezelist

@@ -32,11 +32,16 @@ def main():
 
     output = dict()
     for d in config["domains"]:
-        output[d] = {a for a in addresses if a.domain is None or a.domain == d}
+        # set to make unique, list to make sortable
+        output[d] = list(
+            {a.localpart for a in addresses if a.domain is None or a.domain == d}
+        )
+        output[d].sort()
 
     for k, v in output.items():
         with open(config["output"].format(domain=k), "w") as f:
-            f.write("\n".join(map(lambda a: a.localpart, v)))
+            f.write("\n".join(v))
+            f.write("\n")
 
 
 if __name__ == "__main__":