Update documentation to correct typos.

Author: KristinaPeterson

v2/guide/cli-telemetry.adoc

@@ -65,7 +65,7 @@ Set `cli-telemetry: false` in the `~/.cdk.json` file to disable telemetry for al
 [#telemetry-environment-variable]
 === Opt out using an environment variable
 
-Set the `CDK_DISABLE_CLI_TELEMETRY` environment variable to `true` to disable CLI telemetry in the that environment. 
+Set the `CDK_DISABLE_CLI_TELEMETRY` environment variable to `true` to disable CLI telemetry in that environment. 
 
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v2/guide/core-concepts.adoc

@@ -24,7 +24,7 @@ The {aws} CDK is an open-source framework that you can use to manage your {aws}
 [#concepts-cfn]
 == {aws} CDK and {aws} CloudFormation
 
-The {aws} CDK is tightly integrated with {aws} CloudFormation. {aws} CloudFormation is a fully managed service that you can use to manage and provision your infrastructure on {aws}. With {aws} CloudFormation, you define your infrastructure in templates and deploy them to {aws} CloudFormation. The {aws} CloudFormation service then provisions your infrastructure according to the configuration defined on your templates.
+The {aws} CDK is tightly integrated with {aws} CloudFormation. {aws} CloudFormation is a fully managed service that you can use to manage and provision your infrastructure on {aws}. With {aws} CloudFormation, you define your infrastructure in templates and deploy them to {aws} CloudFormation. The {aws} CloudFormation service then provisions your infrastructure according to the configuration defined in your templates.
 
 {aws} CloudFormation templates are __declarative__, meaning they declare the desired state or outcome of your infrastructure. Using JSON or YAML, you declare your {aws} infrastructure by defining {aws} _resources_ and __properties__. Resources represent the many services on {aws} and properties represent your desired configuration of those services. When you deploy your template to {aws} CloudFormation, your resources and their configured properties are provisioned as described on your template.