Whitespace and case fix

Author: chrisbarr

README.md

@@ -22,8 +22,8 @@ Create a Topic:
 
 Set the Topic's Display Name (required):
 
-	$result = $AmazonSNS->SetTopicAttributes($topicArn, 'DisplayName', 'My SNS Topic Display Name');
-  
+	$result = $AmazonSNS->setTopicAttributes($topicArn, 'DisplayName', 'My SNS Topic Display Name');
+
 Subscribe to this topic:
 
 	$AmazonSNS->subscribe($topicArn, 'email', 'example@github.com');

lib/amazonsns.class.php

@@ -373,7 +373,7 @@ public function setTopicAttributes($topicArn, $attrName, $attrValue)
 
 		$resultXml = $this->_request('SetTopicAttributes', array
 			(
-        'TopicArn' => $topicArn,
+				'TopicArn' => $topicArn,
 				'AttributeName' => $attrName,
 				'AttributeValue' => $attrValue
 			)