Linting and fix docs

Author: richardsheridan

trio/_threads.py

@@ -232,8 +232,8 @@ def from_thread_check_cancelled():
 
     Raises:
         Cancelled: If the corresponding call to `trio.to_thread.run_sync` has had a
-        delivery of cancellation attempted against it, regardless of the value of
-        ``cancellable`` supplied as an argument to it.
+            delivery of cancellation attempted against it, regardless of the value of
+            ``cancellable`` supplied as an argument to it.
         AttributeError: If this thread is not spawned from `trio.to_thread.run_sync`.
     """
     raise_cancel = THREAD_LOCAL.cancel_register[0]

trio/tests/test_threads.py

@@ -804,7 +804,7 @@ def f():
 
     # cancellable=True case: slightly different thread behavior needed
     # check thread is cancelled "soon" after abandonment
-    def f():
+    def f():  # noqa: F811
         ev.wait()
         try:
             from_thread_check_cancelled()