Re-word somewhat-awkward sentence

Author: smurfix

pytest_trio/plugin.py

@@ -91,10 +91,10 @@ def pytest_exception_interact(node, call, report):
 # and do something sensible with it.
 #
 # You should think of fixtures as a dependency graph: each fixtures *uses*
-# zero or more other fixtures, and is *used by* zero or more other fixtures. A
-# fixture should be setup before any of the fixtures it is used by are setup,
-# and it should be torn down as soon as all of the fixtures that use it are
-# torn down. And at root of this dependency graph, we have the test itself,
+# zero or more other fixtures, and is *used by* zero or more other fixtures.
+# A fixture should be setup before any of its dependees are setup, and torn
+# down once all of its dependees have terminated.
+# At the root of this dependency graph, we have the test itself,
 # which is just like a fixture except that instead of having a separate setup
 # and teardown phase, it runs straight through.
 #