Fix import ordering

Author: dstufft

src/pip/_internal/index/collector.py

@@ -34,7 +34,7 @@
 from pip._vendor.requests.exceptions import RetryError, SSLError
 
 from pip._internal.exceptions import NetworkConnectionError
-from pip._internal.models.link import Link, SUPPORTED_HASHES
+from pip._internal.models.link import SUPPORTED_HASHES, Link
 from pip._internal.models.search_scope import SearchScope
 from pip._internal.network.session import PipSession
 from pip._internal.network.utils import raise_for_status

src/pip/_internal/models/link.py

@@ -8,11 +8,11 @@
     TYPE_CHECKING,
     Dict,
     List,
+    Mapping,
     NamedTuple,
     Optional,
     Tuple,
     Union,
-    Mapping,
 )
 
 from pip._internal.utils.filetypes import WHEEL_EXTENSION