docs: Fix grammatical errors (sendgrid#706)

Author: vinayak42

examples/helpers/stats/stats_example.py

@@ -3,10 +3,10 @@
 from sendgrid.helpers.stats import *
 from sendgrid import *
 
-# NOTE: you will need move this file to the root directory of this project to execute properly.
+# NOTE: you will need to move this file to the root directory of this project to execute properly.
 
 # Assumes you set your environment variable:
-# https://github.com/sendgrid/sendgrid-python/blob/master/TROUBLESHOOTING.md#environment-variables-and-your-sendgrid-api-key
+# See: https://github.com/sendgrid/sendgrid-python/blob/master/TROUBLESHOOTING.md#environment-variables-and-your-sendgrid-api-key
 sg = SendGridAPIClient(os.environ.get('SENDGRID_API_KEY'))