[STYLE] Fixed Whitespace (- WIP #79 -)

Changes in file multicast/__main__.py:
 - removed tab from blank line in docstring

Author: reactive-firewall

multicast/__main__.py

@@ -583,7 +583,7 @@ def doStep(self, *args):
 def main(*argv):
 	"""
 	Do main event stuff.
-	
+
 	Executes the multicast command-line interface, by parsing command-line arguments and dispatching
 	the appropriate multicast operations.