Addressing review comments.

* InteractiveShell.instance() is only called one in core.display.
* Fixed docstrings in displayhook.
* displaypub is using print().

IPython/core/display.py

@@ -41,8 +41,9 b' def display(obj, include=None, exclude=None):'
         except for those included in this argument.
     """
     from IPython.core.interactiveshell import InteractiveShell
-    format = InteractiveShell.instance().display_formatter.format
-    publish = InteractiveShell.instance().display_pub.publish
+    inst = InteractiveShell.instance()
+    format = inst.display_formatter.format
+    publish = inst.display_pub.publish
 
     format_dict = format(obj, include=include, exclude=exclude)
     publish('IPython.core.display.display', format_dict)

IPython/core/displayhook.py

@@ -195,13 +195,13 b' class DisplayHook(Configurable):'
         type. It is up to frontends to determine pick a MIME to to use and
         display that data in an appropriate manner.
 
-        This method only compute the format data for the object and should NOT
-        actually print or write that to a stream.
+        This method only computes the format data for the object and should
+        NOT actually print or write that to a stream.
 
         Parameters
         ----------
         result : object
-            The Python object passed to the display hook, whose forat will be
+            The Python object passed to the display hook, whose format will be
             computed.
 
         Returns

IPython/core/displaypub.py

@@ -27,6 +27,8 b' Authors:'
 # Imports
 #-----------------------------------------------------------------------------
 
+from __future__ import print_function
+
 from IPython.config.configurable import Configurable
 
 #-----------------------------------------------------------------------------
@@ -98,7 +100,7 b' class DisplayPublisher(Configurable):'
         from IPython.utils import io
         # The default is to simply write the plain text data using io.Term.
         if data.has_key('text/plain'):
-            print >>io.Term.cout, data['text/plain']
+            print(data['text/plain'], file=io.Term.cout)
 
 
 def publish_display_data(self, source, data, metadata=None):