<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML+RDFa 1.0//EN"` "http://www.w3.org/MarkUp/DTD/xhtml-rdfa-1.dtd">`
Won't be displayed in the editor if they come after a bullet list item, only with the `inline code` syntax. Example (see source to verify):
If I try to escape the
! the lines are displayed but not formatted with code style:
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML+RDFa 1.0//EN" "http://www.w3.org/MarkUp/DTD/xhtml-rdfa-1.dtd">
Also, the doctype string cannot be entered as non-code, unless the
! is escaped. See to source to verify that I inserted the same text in the parenthesis (). This latter one might be by design though, possibly to prevent arbitrary HTML.