Fixing sympy profile.

IPython/config/profile/ipython_config_sympy.py

@@ -1,28 +1,29 b''
 c = get_config()
 
 # This can be used at any point in a config file to load a sub config
 # and merge it into the current one.
 load_subconfig('ipython_config.py')
 
 lines = """
 from __future__ import division
 from sympy import *
 x, y, z = symbols('xyz')
 k, m, n = symbols('kmn', integer=True)
 f, g, h = map(Function, 'fgh')
 """
 
 # You have to make sure that attributes that are containers already
 # exist before using them.  Simple assigning a new list will override
 # all previous values.
 
 if hasattr(c.Global, 'exec_lines'):
     c.Global.exec_lines.append(lines)
 else:
     c.Global.exec_lines = [lines]
 
+# Load the sympy_printing extension to enable nice printing of sympy expr's.
 if hasattr(c.Global, 'extensions'):
-    c.Global.extensions.append('IPython.extensions.sympy_printing')
+    c.Global.extensions.append('sympy_printing')
 else:
-    c.Global.extensions = ['IPython.extensions.sympy_printing']
+    c.Global.extensions = ['sympy_printing']