Rails4: replace hard-coded html with class at ApplicationHelperTest#test_wiki_links_in_tables

See r12784 comment.

git-svn-id: http://svn.redmine.org/redmine/trunk@12811 e93f8b46-1217-0410-a6f0-8f06a7374b81
Rails4: replace hard-coded html with class at ApplicationHelperTest#test_attachment_link_should_link_to_latest_attachment

See r12784 comment.

git-svn-id: http://svn.redmine.org/redmine/trunk@12812 e93f8b46-1217-0410-a6f0-8f06a7374b81
Rails4: replace hard-coded html with class at ApplicationHelperTest#test_attachment_links

See r12784 comment.

git-svn-id: http://svn.redmine.org/redmine/trunk@12813 e93f8b46-1217-0410-a6f0-8f06a7374b81