Only use @ prefix in __str__ if the user is migrated

discord/member.py

@@ -243,7 +243,7 @@ class Member(discord.abc.Messageable, discord.abc.Connectable, _UserTag):
 
         .. describe:: str(x)
 
-            Returns the member's name with a ``@``.
+            Returns the member's handle (e.g. ``@user`` or ``user#discriminator``).
 
     Attributes
     ----------

discord/team.py

@@ -497,7 +497,7 @@ class TeamMember(User):
 
         .. describe:: str(x)
 
-            Returns the team member's name with a ``@``.
+            Returns the team member's handle (e.g. ``@user`` or ``user#discriminator``).
 
     .. versionadded:: 1.3
 

discord/user.py

@@ -277,7 +277,9 @@ class BaseUser(_UserTag):
         )
 
     def __str__(self) -> str:
-        return f'@{self.name}'
+        if self.discriminator == '0':
+            return f'@{self.name}'
+        return f'{self.name}#{self.discriminator}'
 
     def __eq__(self, other: object) -> bool:
         return isinstance(other, _UserTag) and other.id == self.id
@@ -609,7 +611,7 @@ class ClientUser(BaseUser):
 
         .. describe:: str(x)
 
-            Returns the user's name with a ``@``.
+            Returns the user's handle (e.g. ``@user`` or ``user#discriminator``).
 
     .. versionchanged:: 2.0
         :attr:`Locale` is now a :class:`Locale` instead of a Optional[:class:`str`].
@@ -947,7 +949,7 @@ class User(BaseUser, discord.abc.Connectable, discord.abc.Messageable):
 
         .. describe:: str(x)
 
-            Returns the user's name with a ``@``.
+            Returns the user's handle (e.g. ``@user`` or ``user#discriminator``).
 
     Attributes
     -----------

discord/widget.py

@@ -121,7 +121,7 @@ class WidgetMember(BaseUser):
 
         .. describe:: str(x)
 
-            Returns the widget member's name with a ``@``.
+            Returns the widget member's handle (e.g. ``@user`` or ``user#discriminator``).
 
     Attributes
     -----------