Lists And Horizontal Lines Signatures Ambiguity

Happens if we use hyphens for lists. See the HyphenListMarkupProposal for a detailed discussion of the issue.

Test cases

- item 1
- item 2
-- **item 2.1**

-- LisaSimpson
----
Text after horizontal line

This has to be escaped somehow (we use space here)
 5
 -8
 ==
 -3

Some conversation:
 - Hello Lisa, it's me, Bart
 - Bart, what are you doing here?
 - I am spamming! :D

If we use space as escape character, this means that a user that does something like this blow is puzzled why it does not
work as expected:

My visually indented list (because I am an end user, and [[End Users]] do weired stuff like this):

   - item 1
   - item 2