Merge pull request #515 from alirizwi/test

Updated USAGE.md and CONTRIBUTING.md

CONTRIBUTING.md

@@ -142,7 +142,7 @@ The above local "Initial setup" is complete
 * [tox](https://pypi.python.org/pypi/tox)
 * [prism](https://github.com/stoplightio/prism) v0.6 - It should be available in your PATH, but unittest script
 will try to install it locally if not found. Apart from PATH env variable it will check in `~/bin` and `/usr/local/bin`.
-You can install by yourself it in user dir by calling `source test/prism.sh`.
+You can install it by yourself in user dir by calling `source test/prism.sh`.
 
 #### Initial setup: ####
 

USAGE.md

@@ -434,7 +434,7 @@ print response.headers
 
 **This endpoint allows you to create a new suppression group.**
 
-Suppression groups, or unsubscribe groups, are specific types or categories of email that you would like your recipients to be able to unsubscribe from. For example: Daily Newsletters, Invoices, System Alerts.
+Suppression groups, or unsubscribe groups, are specific types or categories of emails that you would like your recipients to be able to unsubscribe from. For example: Daily Newsletters, Invoices, System Alerts.
 
 The **name** and **description** of the unsubscribe group will be visible by recipients when they are managing their subscriptions.
 
@@ -478,7 +478,7 @@ print response.headers
 
 **This endpoint allows you to update or change a suppression group.**
 
-Suppression groups, or unsubscribe groups, are specific types or categories of email that you would like your recipients to be able to unsubscribe from. For example: Daily Newsletters, Invoices, System Alerts.
+Suppression groups, or unsubscribe groups, are specific types or categories of emails that you would like your recipients to be able to unsubscribe from. For example: Daily Newsletters, Invoices, System Alerts.
 
 The **name** and **description** of the unsubscribe group will be visible by recipients when they are managing their subscriptions.
 
@@ -503,7 +503,7 @@ print response.headers
 
 **This endpoint allows you to retrieve a single suppression group.**
 
-Suppression groups, or unsubscribe groups, are specific types or categories of email that you would like your recipients to be able to unsubscribe from. For example: Daily Newsletters, Invoices, System Alerts.
+Suppression groups, or unsubscribe groups, are specific types or categories of emails that you would like your recipients to be able to unsubscribe from. For example: Daily Newsletters, Invoices, System Alerts.
 
 The **name** and **description** of the unsubscribe group will be visible by recipients when they are managing their subscriptions.
 
@@ -525,7 +525,7 @@ print response.headers
 
 You can only delete groups that have not been attached to sent mail in the last 60 days. If a recipient uses the "one-click unsubscribe" option on an email associated with a deleted group, that recipient will be added to the global suppression list.
 
-Suppression groups, or unsubscribe groups, are specific types or categories of email that you would like your recipients to be able to unsubscribe from. For example: Daily Newsletters, Invoices, System Alerts.
+Suppression groups, or unsubscribe groups, are specific types or categories of emails that you would like your recipients to be able to unsubscribe from. For example: Daily Newsletters, Invoices, System Alerts.
 
 The **name** and **description** of the unsubscribe group will be visible by recipients when they are managing their subscriptions.