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/bank.py

@@ -36,11 +36,13 @@ class AccountNotFound(UserError):
     def __init__(self, msg='Account not found'):
         UserError.__init__(self, msg)
 
+
 class TransferError(UserError):
     """
     A transfer has failed.
     """
 
+
 class Currency(object):
     CUR_UNKNOWN        = 0
     CUR_EUR            = 1
@@ -92,6 +94,7 @@ class Recipient(CapBaseObject):
     def __init__(self):
         CapBaseObject.__init__(self, 0)
 
+
 class Account(Recipient, Currency):
     """
     Bank account.
@@ -144,6 +147,7 @@ class Transaction(CapBaseObject):
         return "<Transaction date='%s' label='%s' amount=%s>" % (self.date,
             label, self.amount)
 
+
 class Transfer(CapBaseObject):
     """
     Transfer from an account to a recipient.
@@ -155,6 +159,7 @@ class Transfer(CapBaseObject):
     recipient = Field('Recipient', int, long, basestring)
     reason =    StringField('Reason')
 
+
 class ICapBank(ICapCollection):
     """
     Capability of bank websites to see accounts and transactions.