Syntax error in mitogen.fakessh.Process.wait()

[moreati]

Changeset 325f532 introduced an errant :. This has resulted in https://mitogen.readthedocs.io/en/latest/#automatic-bootstrap showing

$ python ../preamble_size.py
Traceback (most recent call last):
  File "../preamble_size.py", line 9, in <module>
    import mitogen.fakessh
  File "/home/docs/checkouts/readthedocs.org/user_builds/mitogen/checkouts/latest/mitogen/fakessh.py", line 168
    self.wake_event.wait(0.1):
                             ^
SyntaxError: invalid syntax

refs #55