Fixed style according to reviewer and a refactoring error

I had to create this CL due to comitting before the final comments in the last CL
http://review.webrtc.org/1157005/ in revision:
https://code.google.com/p/webrtc/source/detail?r=3642

Changed e.msg to e.fail_msg in logging.error in emulate.py

Added space to error message for windows in check_permissions() in network_emulator

BUG=none
TEST=Windows and linux
Review URL: https://webrtc-codereview.appspot.com/1167006

git-svn-id: http://webrtc.googlecode.com/svn/trunk@3646 4adac7df-926f-26a2-2b94-8c16560cd09d

tools/network_emulator/emulate.py

@@ -154,7 +154,7 @@ def _main():
   try:
     emulator.check_permissions()
   except network_emulator.NetworkEmulatorError as e:
-    logging.error('Error: %s\n\nCause: %s', e.msg, e.error)
+    logging.error('Error: %s\n\nCause: %s', e.fail_msg, e.error)
     return -1
 
   if not options.target_ip:
@@ -186,7 +186,7 @@ def _main():
     logging.info('Completed Network Emulation.')
     return 0
   except network_emulator.NetworkEmulatorError as e:
-    logging.error('Error: %s\n\nCause: %s', e.msg, e.error)
+    logging.error('Error: %s\n\nCause: %s', e.fail_msg, e.error)
     return -2
 
 if __name__ == '__main__':

tools/network_emulator/network_emulator.py

@@ -97,7 +97,7 @@ class NetworkEmulator(object):
     # AttributeError will be raised on Windows.
       if ctypes.windll.shell32.IsUserAnAdmin() == 0:
         raise NetworkEmulatorError('You must run this script with administrator'
-                                   'privileges.')
+                                   ' privileges.')
 
   def _create_dummynet_rule(self, pipe_id, from_address, to_address,
                             port_range):
@@ -169,7 +169,7 @@ def _run_ipfw_command(command, fail_msg=None):
     fail_msg: Message describing the error in case the command fails.
 
   Raises:
-    NetworkEmulatorError: If command fails. Message is set by the fail_msg
+    NetworkEmulatorError: If command fails a message is set by the fail_msg
     parameter.
   """
   if sys.platform == 'win32':