Merge pull request cloudfoundry#347 from wbean1/revisions

Correct command to get app guid in revisions doc

Author: ljarzynski

revisions.html.md.erb

@@ -57,7 +57,7 @@ To enable revisions for an app, do the following:
 1. Get the GUID of the app:
 
 	```
-	cf APP-NAME --guid
+	cf app APP-NAME --guid
 	```
 
 1. Run the following command:
@@ -78,7 +78,7 @@ To list revisions for an app, do the following:
 1. Get the GUID of the app:
 
 	```
-	cf APP-NAME --guid
+	cf app APP-NAME --guid
 	```
 
 1. Run the following command:
@@ -96,7 +96,7 @@ Deployed revisions are revisions linked to started processes in an app. To list
 1. Get the GUID of the app:
 
 	```
-	cf APP-NAME --guid
+	cf app APP-NAME --guid
 	```
 
 1. Run the following command:
@@ -124,15 +124,15 @@ To roll back to a previous revision, do the following:
 1. Get the GUID of the app:
 
 	```
-	cf APP-NAME --guid
+	cf app APP-NAME --guid
 	```
 
 1. Get the GUID of the revision. See [View Revisions](#view). 
 
 1. Create a deployment using CAPI:
 
 	```
-	cf curl v3/deployments" \
+	cf curl v3/deployments \
 	-X POST \
 	-d '{
 	  "revision": {
@@ -157,4 +157,4 @@ To roll back to a previous revision, do the following:
 To add metadata to a revision, follow the steps to [Add Metadata to an Object](../adminguide/metadata.html). 
 <% else %>
 To add metadata to a revision, follow the steps to [Add Metadata to an Object](https://docs.cloudfoundry.org/adminguide/metadata.html). 
-<% end %>
+<% end %>