Pylons/webtest — pull request #112 by soasme (2014-05-04 06:53:22+00:00)
Title: Call method as described in documentation.

Get `TypeError: do_request() takes exactly 4 arguments (2 given)` by following the code in document:
```
To use this::

req = webtest.TestRequest.blank('url', ...args...)
resp = app.do_request(req)
```
Fix it.