Merge branch 'stable'

src/flask/app.py

@@ -265,9 +265,9 @@ class Flask(App):
         # For one, it might be created while the server is running (e.g. during
         # development). Also, Google App Engine stores static files somewhere
         if self.has_static_folder:
-            assert (
-                bool(static_host) == host_matching
-            ), "Invalid static_host/host_matching combination"
+            assert bool(static_host) == host_matching, (
+                "Invalid static_host/host_matching combination"
+            )
             # Use a weakref to avoid creating a reference cycle between the app
             # and the view function (see #3761).
             self_ref = weakref.ref(self)

src/flask/cli.py

@@ -684,7 +684,9 @@ class FlaskGroup(AppGroup):
         return super().make_context(info_name, args, parent=parent, **extra)
 
     def parse_args(self, ctx: click.Context, args: list[str]) -> list[str]:
-        if not args and self.no_args_is_help:
+        if (not args and self.no_args_is_help) or (
+            len(args) == 1 and args[0] in self.get_help_option_names(ctx)
+        ):
             # Attempt to load --env-file and --app early in case they
             # were given as env vars. Otherwise no_args_is_help will not
             # see commands from app.cli.

src/flask/testing.py

@@ -58,9 +58,9 @@ class EnvironBuilder(werkzeug.test.EnvironBuilder):
     ) -> None:
         assert not (base_url or subdomain or url_scheme) or (
             base_url is not None
-        ) != bool(
-            subdomain or url_scheme
-        ), 'Cannot pass "subdomain" or "url_scheme" with "base_url".'
+        ) != bool(subdomain or url_scheme), (
+            'Cannot pass "subdomain" or "url_scheme" with "base_url".'
+        )
 
         if base_url is None:
             http_host = app.config.get("SERVER_NAME") or "localhost"

src/flask/typing.py

@@ -1,5 +1,6 @@
 from __future__ import annotations
 
+import collections.abc as cabc
 import typing as t
 
 if t.TYPE_CHECKING:  # pragma: no cover
@@ -17,6 +18,8 @@ ResponseValue = t.Union[
     t.Mapping[str, t.Any],
     t.Iterator[str],
     t.Iterator[bytes],
+    cabc.AsyncIterable[str],  # for Quart, until App is generic.
+    cabc.AsyncIterable[bytes],
 ]
 
 # the possible types for an individual HTTP header