Fix inconsistent whitespace

git-svn-id: https://svn.apache.org/repos/asf/poi/trunk@1590190 13f79535-47bb-0310-9956-ffa450edef68
NDocumentOutputStream write logic

git-svn-id: https://svn.apache.org/repos/asf/poi/trunk@1590191 13f79535-47bb-0310-9956-ffa450edef68