Escape character doesn't work correctly.

[KorwinD]

If I put '~' before freestanding link(example: ~http://google.com/), I should get output string without link, but I get it with link.
More examples of unobvious working of escape character:

1. I write ~// something //, I get // something.
2. I write
   * f
~* d
   I get

• j * d

3. I write
   {{{
~}}}
}}}
   I get ~}}}, but I should get }}}.

P.S. I'm talking about creole parsing in Github, and I haven't compile this project yet.