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/ui/Machine.py

@@ -79,7 +79,7 @@ class MachineUI(UIBase):
         s._printData('connecting', "%s\n%s" % (hostname, str(port)))
 
     def syncfolders(s, srcrepos, destrepos):
-        s._printData('syncfolders', "%s\n%s" % (s.getnicename(srcrepos), 
+        s._printData('syncfolders', "%s\n%s" % (s.getnicename(srcrepos),
                                                 s.getnicename(destrepos)))
 
     def syncingfolder(s, srcrepos, srcfolder, destrepos, destfolder):

offlineimap/ui/__init__.py

@@ -20,7 +20,7 @@ from offlineimap.ui import TTY, Noninteractive, Machine
 
 UI_LIST = {'ttyui': TTY.TTYUI,
            'basic': Noninteractive.Basic,
-           'quiet': Noninteractive.Quiet, 
+           'quiet': Noninteractive.Quiet,
            'machineui': Machine.MachineUI}
 
 #add Blinkenlights UI if it imports correctly (curses installed)

offlineimap/ui/debuglock.py

@@ -25,7 +25,7 @@ class DebuggingLock:
     def __init__(self, name):
         self.lock = Lock()
         self.name = name
-        
+
     def acquire(self, blocking = 1):
         self.print_tb("Acquire lock")
         self.lock.acquire(blocking)
@@ -45,5 +45,5 @@ class DebuggingLock:
         self.logmsg(".... %s: Thread %s attempting to %s\n" % \
                     (self.name, currentThread().getName(), msg) + \
                     "\n".join(traceback.format_list(traceback.extract_stack())))
-        
+