detect string in a way that works with both Python 2.x and 3.x

[dweaver]

This is how the six package detects strings (see http://stackoverflow.com/a/20612311/81346)

It resolves https://github.com/docopt/docopt/issues/219

[danslimmon]

:+1:

[simon-weber]

I just ran into this frustrating bug. Anything keeping us from merging?

[dweaver]

Nothing should keep us from merging as far as I know, but I'm not a collaborator. This fork has my fix in it: https://pypi.python.org/pypi/docopt-unicode/0.6.1

[dogweather]

:+1:

[dweaver]

Does anyone have an example where sys.argv can contain unicode? The docopt maintainer is asking:

https://github.com/docopt/docopt/issues/219#issuecomment-136360365

[angdraug]

I ran into this when injecting arguments into a docopt based module in a unit test with something like docopt(__doc__, ['a', 'b']).

[angdraug]

Forgot to mention: doesn't have to be Python 3, the problem occurs with Python 2 and unicode_literals, too.

[ashishb]

@dweaver What's the plan for this PR?