Update javadoc to reflect behavior change when defaultCharset is provided and the content's charset is not available.

git-svn-id: https://svn.apache.org/repos/asf/httpcomponents/httpcore/trunk@1618159 13f79535-47bb-0310-9956-ffa450edef68
Removed trailing spaces

git-svn-id: https://svn.apache.org/repos/asf/httpcomponents/httpcore/trunk@1618162 13f79535-47bb-0310-9956-ffa450edef68