Mark private notes more clearly (#16240).

Contributed by Jan Schulz-Hofen.


git-svn-id: http://svn.redmine.org/redmine/trunk@13367 e93f8b46-1217-0410-a6f0-8f06a7374b81
pdf: add test to export issue pdf with UTF-8 U+FFFD (#17826)

git-svn-id: http://svn.redmine.org/redmine/trunk@13368 e93f8b46-1217-0410-a6f0-8f06a7374b81