Pylons/pyramid — pull request #719 by ponomar (2012-11-11 09:00:24+00:00)
Title: Improve include mechanism with not None route_prefix

Let's supose we have:

```python
def add_cabinet_routes(config):
config.add_route('cabinet.index_not_slashed', '')
config.add_route('cabinet.index_slashed', '/')
# much more routes

# in main()
config.include(add_cabinet_routes, prefix_url='/cabinet')
```
Now: we will have 2 equivalent urls: `/cabinet/` and `/cabinet/`
Will be: we will have 2 distinct urls: `/cabinet` and `/cabinet/`

So now we can't add base url without trailing slash with existent `route_prefix`.