README.rdoc in fluent-plugin-sns-2.1.2 vs README.rdoc in fluent-plugin-sns-2.1.4

@@ -19,13 +19,13 @@
 
       # following attibutes are required
 
       sns_topic_name {sns_topic_name}
 
-      # following attibutes are required if you don't use IAM Role and you don't set environment variables
+      # following attibutes are required if you don't use IAM Role nor export credentials to ENV
 
-      aws_key_id {your_aws_key_id}       # Default: ENV['AWS_ACCESS_KEY_ID']
-      aws_sec_key {your_aws_secret_key}  # Default: ENV['AWS_SECRET_ACCESS_KEY']
+      aws_key_id {your_aws_key_id}
+      aws_sec_key {your_aws_secret_key}
 
       # following attibutes are optional
 
       sns_endpoint {endpointURL}