settings: update vim/syntax/asciidoc

git-svn-id: https://subversion.assembla.com/svn/magicant/settings@302 9a5e03f8-c55e-0410-a490-9d27d325e308
settings: fix error detection in case statement in sh.vim

git-svn-id: https://subversion.assembla.com/svn/magicant/settings@303 9a5e03f8-c55e-0410-a490-9d27d325e308