Acrolinx fixes

Author: JamesJBarnett

articles/network-watcher/nsg-flow-logs-policy-portal.md

@@ -54,7 +54,7 @@ There are separate instructions for each policy below.
 
 ### How the policy works
 
-The policy checks all existing ARM objects of type “Microsoft.Network/networkSecurityGroups”, that is it looks at all NSGs in a given scope, and checks for the existence of linked Flow logs via the Flow Logs property of the NSG. If the property doesn't exist, the NSG is flagged.
+The policy checks all existing ARM objects of type “Microsoft.Network/networkSecurityGroups”, that is, it looks at all NSGs in a given scope, and checks for the existence of linked Flow logs via the Flow Logs property of the NSG. If the property doesn't exist, the NSG is flagged.
 
 If you want to see the full definition of the policy, you can visit the [Definitions tab](https://portal.azure.com/#blade/Microsoft_Azure_Policy/PolicyMenuBlade/Definitions) and search for "Flow logs" to find the policy
 
@@ -83,7 +83,7 @@ You should see something similar to the following screenshot once your policy ru
 
 ### Policy Structure
 
-The policy checks all existing ARM objects of type “Microsoft.Network/networkSecurityGroups”, that is it looks at all NSGs in a given scope, and checks for the existence of linked Flow logs via the Flow Logs property of the NSG. If the property doesn't exist, the policy deploys a Flow log. 
+The policy checks all existing ARM objects of type “Microsoft.Network/networkSecurityGroups”, that is, it looks at all NSGs in a given scope, and checks for the existence of linked Flow logs via the Flow Logs property of the NSG. If the property doesn't exist, the policy deploys a Flow log. 
 
 If you want to see the full definition of the policy, you can visit the [Definitions tab](https://portal.azure.com/#blade/Microsoft_Azure_Policy/PolicyMenuBlade/Definitions) and search for "Flow logs" to find the policy. 
 
@@ -132,4 +132,4 @@ You should see something like the following screenshot once your policy. In case
 
 -	Learn about [Traffic Analytics Built-in Policies](./traffic-analytics-policy-portal.md)
 -	Use this [tutorial](./quickstart-configure-network-security-group-flow-logs-from-arm-template.md) Go deeper by using ARM templates to deploy Flow Logs and Traffic Analytics.
--	Learn more about [Network Watcher](./index.yml)
+-	Learn more about [Network Watcher](./index.yml)