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

For nonbreaking spaces, which are somewhat related, I'd suggest to use
naked single underscores. Double underscores would be reserved for engines
which support underline.

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

I removed the following line from the decision:

* //Consequence:// the current linebreak as of Creole 0.5 (double backslash) is removed from Creole.

The current linebreak would stay and uses could just type a backslash followed by a space or alphanumeric character to get a linebreak.

-- [[ChuckSmith]], 2007-Mar-13

Then I ask here to consider as a request what I called a consequence.
If backslash becomes the escape character, double backslash should
be an escaped backslash, for two reasons: it wouldn't be an exception,
and with your proposition, it would be impossible to write
backslash + dot + alphanum.

Of course, the discussion is moot if we eventually choose the tilde.

-- [[YvesPiguet]], 2007-Mar-13