pep8: Fix E127 continuation line over-indented

There are a bunch of these remaining, but I don't think the right course is
to 'fix' all of them to make pep8 happy, but instead to either change
the test in pep8 to consider that a continuation line may itself
be continued halfway, OR, to change the code in these lines to be more
readable by removing the need for all those nested continuations.

Personally, I find multiply-broken lines (aka nested continuations) really
hard to read.

examples/treeping64.py

@@ -10,9 +10,9 @@ def treePing64():
     "Run ping test on 64-node tree networks."
 
     results = {}
-    switches = { # 'reference kernel': KernelSwitch,
-                 'reference user': UserSwitch,
-                 'Open vSwitch kernel': OVSKernelSwitch }
+    switches = {  # 'reference kernel': KernelSwitch,
+                  'reference user': UserSwitch,
+                  'Open vSwitch kernel': OVSKernelSwitch }
 
     for name in switches:
         print "*** Testing", name, "datapath"