Repository: boto/botocore (python)
Issue: UserData docs for EC2 should be updated
The docs currently say:

![image](https://cloud.githubusercontent.com/assets/368057/8312591/58a4eb7a-1992-11e5-9900-2d0c9e4625c3.png)


We should clarify this.  We *always* encode the user data to base64 if it's provided.  I think we should remove the append doc handler and just completely replace the docs with a doc string that says that this is a string and that you don't need to base64 encode the value.
Pull request description: Making UserData docs more clear about base64
This commit updates the UserData docs to be more clear that you should not base64 encode the value when providing the parameter. The text is now bold to make it more pronounced.

Also added a minor typo fix for the default AutoPopulatedParam description.

Closes #585 

@jamesls @kyleknap 

Patch:
diff --git a/botocore/docs/utils.py b/botocore/docs/utils.py
index e0af0086b..3d79d1ce6 100644
--- a/botocore/docs/utils.py
+++ b/botocore/docs/utils.py
@@ -102,8 +102,8 @@ class AutoPopulatedParam(object):
         self.param_description = param_description
         if param_description is None:
             self.param_description = (
-                'Please note that this parameter is automatically populated if'
-                'it is not provided. Including this parameter is not '
+                'Please note that this parameter is automatically populated '
+                'if it is not provided. Including this parameter is not '
                 'required\n')
 
     def document_auto_populated_param(self, event_name, section, **kwargs):
diff --git a/botocore/handlers.py b/botocore/handlers.py
index e87fd75f9..eae563c09 100644
--- a/botocore/handlers.py
+++ b/botocore/handlers.py
@@ -334,7 +334,9 @@ def base64_encode_user_data(params, **kwargs):
 
 
 def document_base64_encoding():
-    description = 'UserData will be automatically base64 encoded if necessary.'
+    description = ('**This value will be base64 encoded automatically. Do '
+                   'not base64 encode this value prior to performing the '
+                   'operation.**')
     append = AppendParamDocumentation('UserData', description)
     return append.append_documentation
 


Test patch:
diff --git a/tests/functional/docs/test_autoscaling.py b/tests/functional/docs/test_autoscaling.py
index d6e47db27..03c245575 100644
--- a/tests/functional/docs/test_autoscaling.py
+++ b/tests/functional/docs/test_autoscaling.py
@@ -17,4 +17,4 @@ class TestAutoscalingDocs(BaseDocsFunctionalTest):
     def test_documents_encoding_of_user_data(self):
         docs = self.get_parameter_documentation_from_service(
             'autoscaling', 'create_launch_configuration', 'UserData')
-        self.assertIn('automatically base64', docs.decode('utf-8'))
+        self.assertIn('base64 encoded automatically', docs.decode('utf-8'))
diff --git a/tests/functional/docs/test_ec2.py b/tests/functional/docs/test_ec2.py
index e69fa2e6f..485e97453 100644
--- a/tests/functional/docs/test_ec2.py
+++ b/tests/functional/docs/test_ec2.py
@@ -17,7 +17,7 @@ class TestEc2Docs(BaseDocsFunctionalTest):
     def test_documents_encoding_of_user_data(self):
         docs = self.get_parameter_documentation_from_service(
             'ec2', 'run_instances', 'UserData')
-        self.assertIn('automatically base64', docs.decode('utf-8'))
+        self.assertIn('base64 encoded automatically', docs.decode('utf-8'))
 
     def test_copy_snapshot_presigned_url_is_autopopulated(self):
         self.assert_is_documented_as_autopopulated_param(