Fix incorrect wrapped message
It was correct in trunk ( r1434882 ) and broken during backport ( r1434887 )
To actually wrap a line in a properties file, you have to end it with a backslash.

git-svn-id: https://svn.apache.org/repos/asf/tomcat/tc7.0.x/trunk@1457378 13f79535-47bb-0310-9956-ffa450edef68