[Python] [LGTM.com] False-positive: Unreachable statement: #2206 sequel

**Description of the false positive**

Same as #2206. Except the reproducer contains several subsequent `suppress()`es:
```python
import contextlib

def some_func():
with contextlib.suppress(KeyError):
return dict()['a_key']

with contextlib.suppress(KeyError): # LGTM complains that it's unreachable
return dict()['b_key']

with contextlib.suppress(KeyError):
return dict()['c_key']

return 'fallback'
```

So I guess #2078 needs more test cases maybe...

**URL to the alert on the project page on LGTM.com**

https://lgtm.com/projects/g/cherrypy/cheroot/snapshot/0c678bab518ca17151540b7d744faca49b941763/files/cheroot/ssl/builtin.py#x46e331ef60ba4bf1:1