tweak comment [ci skip]

Author: alimanfoo

zarr/tests/test_core.py

@@ -673,7 +673,7 @@ def test_pickle(self):
 
         # round trip through pickle
         dump = pickle.dumps(z)
-        # some stores cannot be opened twice at the same time, need to close first
+        # some stores cannot be opened twice at the same time, need to close
         # store before can round-trip through pickle
         if hasattr(z.store, 'close'):
             z.store.close()

zarr/tests/test_hierarchy.py

@@ -832,7 +832,7 @@ def test_pickle(self):
 
         # round-trip through pickle
         dump = pickle.dumps(g)
-        # some stores cannot be opened twice at the same time, need to close first
+        # some stores cannot be opened twice at the same time, need to close
         # store before can round-trip through pickle
         if hasattr(g.store, 'close'):
             g.store.close()

zarr/tests/test_storage.py

@@ -138,7 +138,7 @@ def test_pickle(self):
 
         # round-trip through pickle
         dump = pickle.dumps(store)
-        # some stores cannot be opened twice at the same time, need to close first
+        # some stores cannot be opened twice at the same time, need to close
         # store before can round-trip through pickle
         if hasattr(store, 'close'):
             store.close()