add test of quoted printable UTF-8 mail reviving (#14675)

git-svn-id: http://svn.redmine.org/redmine/trunk@12901 e93f8b46-1217-0410-a6f0-8f06a7374b81
svn propset svn:eol-style native fixture (#14675)


git-svn-id: http://svn.redmine.org/redmine/trunk@12902 e93f8b46-1217-0410-a6f0-8f06a7374b81