fix(converter): fix clean_content not using nicknames in some cases (#1029)

Author: shiftinv

changelog/1029.bugfix.rst

@@ -0,0 +1 @@
+|commands| Fix member nickname not being used by :class:`~ext.commands.clean_content` converter when user wasn't found in mentions.

disnake/ext/commands/converter.py

@@ -1027,9 +1027,11 @@ async def convert(self, ctx: AnyContext, argument: str) -> str:
         bot: disnake.Client = ctx.bot
 
         def resolve_user(id: int) -> str:
-            m = (msg and _utils_get(msg.mentions, id=id)) or bot.get_user(id)
-            if m is None and ctx.guild:
-                m = ctx.guild.get_member(id)
+            m = (
+                (msg and _utils_get(msg.mentions, id=id))
+                or (ctx.guild and ctx.guild.get_member(id))
+                or bot.get_user(id)
+            )
             return f"@{m.display_name if self.use_nicknames else m.name}" if m else "@deleted-user"
 
         def resolve_role(id: int) -> str: