Easy spacing fixes, trailing stuff

Remove useless trailing \
Remove trailing spaces
Add missing empty lines

autopep8 -ir -j2 --select=E301,E302,E502,W291,W293,W391 .

Diff quickly checked.

weboob/capabilities/weather.py

@@ -71,6 +71,7 @@ class Forecast(CapBaseObject):
         self.high = Temperature(high, unit)
         self.text = text
 
+
 class Current(CapBaseObject):
     """
     Current weather.
@@ -85,6 +86,7 @@ class Current(CapBaseObject):
         self.text = text
         self.temp = Temperature(temp, unit)
 
+
 class City(CapBaseObject):
     """
     City where to find weather.
@@ -95,11 +97,13 @@ class City(CapBaseObject):
         CapBaseObject.__init__(self, id)
         self.name = name
 
+
 class CityNotFound(UserError):
     """
     Raised when a city is not found.
     """
 
+
 class ICapWeather(IBaseCap):
     """
     Capability for weather websites.