Convert all test suite sync funcs

examples/actor_spawning_and_causality.py

@@ -1,7 +1,7 @@
 import tractor
 
 
-def cellar_door():
+async def cellar_door():
     assert not tractor.is_root_process()
     return "Dang that's beautiful"
 

examples/actor_spawning_and_causality_with_daemon.py

@@ -1,7 +1,7 @@
 import tractor
 
 
-def movie_theatre_question():
+async def movie_theatre_question():
     """A question asked in a dark theatre, in a tangent
     (errr, I mean different) process.
     """

examples/parallelism/concurrent_actors_primes.py

@@ -29,7 +29,7 @@ PRIMES = [
 ]
 
 
-def is_prime(n):
+async def is_prime(n):
     if n < 2:
         return False
     if n == 2:

tests/test_cancellation.py

@@ -120,7 +120,7 @@ def test_multierror_fast_nursery(arb_addr, start_method, num_subactors, delay):
         assert exc.type == AssertionError
 
 
-def do_nothing():
+async def do_nothing():
     pass
 
 

tests/test_spawning.py

@@ -51,7 +51,7 @@ def test_local_arbiter_subactor_global_state(arb_addr):
     assert result == 10
 
 
-def movie_theatre_question():
+async def movie_theatre_question():
     """A question asked in a dark theatre, in a tangent
     (errr, I mean different) process.
     """
@@ -80,7 +80,7 @@ async def test_movie_theatre_convo(start_method):
         await portal.cancel_actor()
 
 
-def cellar_door():
+async def cellar_door():
     return "Dang that's beautiful"