Fixed that UrlHelper#link_to_unless/link_to_if used html_escape on the name if no link was to be applied. This is unnecessary and breaks its use with images #1649 [joergd@pobox.com]

git-svn-id: http://svn-commit.rubyonrails.org/rails/trunk@1786 5ecf4fe2-1ee6-0310-87b1-e25e094e27de