THRIFT-3596 Better conformance to PEP8

This closes #832
diff --git a/lib/py/src/protocol/TMultiplexedProtocol.py b/lib/py/src/protocol/TMultiplexedProtocol.py
index d25f367..309f896 100644
--- a/lib/py/src/protocol/TMultiplexedProtocol.py
+++ b/lib/py/src/protocol/TMultiplexedProtocol.py
@@ -22,18 +22,19 @@
 
 SEPARATOR = ":"
 
-class TMultiplexedProtocol(TProtocolDecorator.TProtocolDecorator):
-  def __init__(self, protocol, serviceName):
-    TProtocolDecorator.TProtocolDecorator.__init__(self, protocol)
-    self.serviceName = serviceName
 
-  def writeMessageBegin(self, name, type, seqid):
-    if (type == TMessageType.CALL or
-        type == TMessageType.ONEWAY):
-      self.protocol.writeMessageBegin(
-        self.serviceName + SEPARATOR + name,
-        type,
-        seqid
-      )
-    else:
-      self.protocol.writeMessageBegin(name, type, seqid)
+class TMultiplexedProtocol(TProtocolDecorator.TProtocolDecorator):
+    def __init__(self, protocol, serviceName):
+        TProtocolDecorator.TProtocolDecorator.__init__(self, protocol)
+        self.serviceName = serviceName
+
+    def writeMessageBegin(self, name, type, seqid):
+        if (type == TMessageType.CALL or
+                type == TMessageType.ONEWAY):
+            self.protocol.writeMessageBegin(
+                self.serviceName + SEPARATOR + name,
+                type,
+                seqid
+            )
+        else:
+            self.protocol.writeMessageBegin(name, type, seqid)