Prune trailing whitespaces from code and documentation

They are redundant in all pruned cases and sometimes even create some
problems, e.g., when one tries to jump through paragraphs in vi.

Signed-off-by: Eygene Ryabinkin <rea@codelabs.ru>

offlineimap/repository/Base.py

@@ -116,7 +116,7 @@ class BaseRepository(CustomConfig.ConfigHelperMixin, object):
 
     def getlocaleval(self):
         return self.account.getlocaleval()
-    
+
     def getfolders(self):
         """Returns a list of ALL folders on this server."""
         return []

offlineimap/repository/Gmail.py

@@ -28,7 +28,7 @@ class GmailRepository(IMAPRepository):
     HOSTNAME = "imap.gmail.com"
     # Gmail IMAP server port
     PORT = 993
-    
+
     def __init__(self, reposname, account):
         """Initialize a GmailRepository object."""
         # Enforce SSL usage

offlineimap/repository/IMAP.py

@@ -362,7 +362,7 @@ class IMAPRepository(BaseRepository):
                                        OfflineImapError.ERROR.FOLDER)
         finally:
             self.imapserver.releaseconnection(imapobj)
-            
+
 class MappedIMAPRepository(IMAPRepository):
     def getfoldertype(self):
         return MappedIMAPFolder

offlineimap/repository/LocalStatus.py

@@ -91,7 +91,7 @@ class LocalStatusRepository(BaseRepository):
         return folder
 
     def getfolders(self):
-        """Returns a list of all cached folders.  
+        """Returns a list of all cached folders.
 
         Does nothing for this backend. We mangle the folder file names
         (see getfolderfilename) so we can not derive folder names from

offlineimap/repository/Maildir.py

@@ -85,7 +85,7 @@ class MaildirRepository(BaseRepository):
         if self.account.dryrun:
             return
         full_path = os.path.abspath(os.path.join(self.root, foldername))
-    
+
         # sanity tests
         if self.getsep() == '/':
             for component in foldername.split('/'):