Correct typo

Author: tonyg

src/com/rabbitmq/client/impl/LongString.java

@@ -36,7 +36,7 @@
 
 /**
  * An object providing access to a LongString.
- * This might be implemeted to read directly from connection
+ * This might be implemented to read directly from connection
  * socket, depending on the size of the content to be read -
  * long strings may contain up to 4Gb of content.
  */