Fix Pub/Sub comment typo (GoogleCloudPlatform#1913)

Author: joseotoro

appengine/flexible/pubsub/main.py

@@ -24,7 +24,7 @@
 app = Flask(__name__)
 
 # Configure the following environment variables via app.yaml
-# This is used in the push request handler to veirfy that the request came from
+# This is used in the push request handler to verify that the request came from
 # pubsub and originated from a trusted source.
 app.config['PUBSUB_VERIFICATION_TOKEN'] = \
     os.environ['PUBSUB_VERIFICATION_TOKEN']

appengine/standard/pubsub/main.py

@@ -25,7 +25,7 @@
 app = Flask(__name__)
 
 # Configure the following environment variables via app.yaml
-# This is used in the push request handler to veirfy that the request came from
+# This is used in the push request handler to verify that the request came from
 # pubsub and originated from a trusted source.
 app.config['PUBSUB_VERIFICATION_TOKEN'] = \
     os.environ['PUBSUB_VERIFICATION_TOKEN']