Fix various a -> an typos across the library

Closes #8301, #8287

discord/app_commands/models.py

@@ -108,7 +108,7 @@ class AllChannels:
 
 
 class AppCommand(Hashable):
-    """Represents a application command.
+    """Represents an application command.
 
     In common parlance this is referred to as a "Slash Command" or a
     "Context Menu Command".
@@ -732,7 +732,7 @@ class AppCommandThread(Hashable):
 
 
 class Argument:
-    """Represents a application command argument.
+    """Represents an application command argument.
 
     .. versionadded:: 2.0
 

discord/app_commands/transformers.py

@@ -73,7 +73,7 @@ if TYPE_CHECKING:
 
 @dataclass
 class CommandParameter:
-    """Represents a application command parameter.
+    """Represents an application command parameter.
 
     Attributes
     -----------

discord/app_commands/tree.py

@@ -344,7 +344,7 @@ class CommandTree(Generic[ClientT]):
                 self._context_menus.update(current)
             return
         elif not isinstance(command, (Command, Group)):
-            raise TypeError(f'Expected a application command, received {command.__class__!r} instead')
+            raise TypeError(f'Expected an application command, received {command.__class__!r} instead')
 
         # todo: validate application command groups having children (required)
 
@@ -538,7 +538,7 @@ class CommandTree(Generic[ClientT]):
         guild: Optional[Snowflake] = None,
         type: AppCommandType = AppCommandType.chat_input,
     ) -> Optional[Union[Command[Any, ..., Any], ContextMenu, Group]]:
-        """Gets a application command from the tree.
+        """Gets an application command from the tree.
 
         Parameters
         -----------
@@ -900,7 +900,7 @@ class CommandTree(Generic[ClientT]):
         guilds: Sequence[Snowflake] = MISSING,
         extras: Dict[Any, Any] = MISSING,
     ) -> Callable[[ContextMenuCallback], ContextMenu]:
-        """Creates a application command context menu from a regular function directly under this tree.
+        """Creates an application command context menu from a regular function directly under this tree.
 
         This function must have a signature of :class:`~discord.Interaction` as its first parameter
         and taking either a :class:`~discord.Member`, :class:`~discord.User`, or :class:`~discord.Message`,

discord/ext/commands/core.py

@@ -406,7 +406,7 @@ class Command(_BaseCommand, Generic[CogT, P, T]):
         elif isinstance(cooldown, CooldownMapping):
             buckets: CooldownMapping[Context[Any]] = cooldown
         else:
-            raise TypeError("Cooldown must be a an instance of CooldownMapping or None.")
+            raise TypeError("Cooldown must be an instance of CooldownMapping or None.")
         self._buckets: CooldownMapping[Context[Any]] = buckets
 
         try:

discord/flags.py

@@ -1322,28 +1322,28 @@ class ApplicationFlags(BaseFlags):
 
         .. describe:: x | y, x |= y
 
-            Returns a ApplicationFlags instance with all enabled flags from
+            Returns an ApplicationFlags instance with all enabled flags from
             both x and y.
 
             .. versionadded:: 2.0
 
         .. describe:: x & y, x &= y
 
-            Returns a ApplicationFlags instance with only flags enabled on
+            Returns an ApplicationFlags instance with only flags enabled on
             both x and y.
 
             .. versionadded:: 2.0
 
         .. describe:: x ^ y, x ^= y
 
-            Returns a ApplicationFlags instance with only flags enabled on
+            Returns an ApplicationFlags instance with only flags enabled on
             only one of x or y, not on both.
 
             .. versionadded:: 2.0
 
         .. describe:: ~x
 
-            Returns a ApplicationFlags instance with all flags inverted from x.
+            Returns an ApplicationFlags instance with all flags inverted from x.
 
             .. versionadded:: 2.0
 
@@ -1518,28 +1518,28 @@ class AutoModPresets(ArrayFlags):
 
         .. describe:: x | y, x |= y
 
-            Returns a AutoModPresets instance with all enabled flags from
+            Returns an AutoModPresets instance with all enabled flags from
             both x and y.
 
             .. versionadded:: 2.0
 
         .. describe:: x & y, x &= y
 
-            Returns a AutoModPresets instance with only flags enabled on
+            Returns an AutoModPresets instance with only flags enabled on
             both x and y.
 
             .. versionadded:: 2.0
 
         .. describe:: x ^ y, x ^= y
 
-            Returns a AutoModPresets instance with only flags enabled on
+            Returns an AutoModPresets instance with only flags enabled on
             only one of x or y, not on both.
 
             .. versionadded:: 2.0
 
         .. describe:: ~x
 
-            Returns a AutoModPresets instance with all flags inverted from x.
+            Returns an AutoModPresets instance with all flags inverted from x.
 
             .. versionadded:: 2.0