To avoid repeating the same discussion, I've written detailed proposals for
backslash and tilde. Personnally, I'd prefer backslashes to avoid using an
additional ASCII character (they become precious), but tildes would be fine
by me too. I expect that changing the current linebreak markup won't be
welcome by everyone, but I think alternatives if backslash is the escape
character are much worse.

-- [[YvesPiguet]], 2007-Mar-08