Update some print statements in the docs

docs/source/interactive/reference.rst

@@ -181,11 +181,11 b' magic, a cell one and one that works in both modes, using just plain functions:'
 
     from IPython.core.magic import (register_line_magic, register_cell_magic,
                                     register_line_cell_magic)
-		
+
     @register_line_magic
     def lmagic(line):
         "my line magic"
-	return line
+        return line
 
     @register_cell_magic
     def cmagic(line, cell):
@@ -195,11 +195,11 b' magic, a cell one and one that works in both modes, using just plain functions:'
     @register_line_cell_magic
     def lcmagic(line, cell=None):
         "Magic that works both as %lcmagic and as %%lcmagic"
-	if cell is None:
-	    print "Called as line magic"
-	    return line
-	else:
-	    print "Called as cell magic"
+        if cell is None:
+            print("Called as line magic")
+            return line
+        else:
+            print("Called as cell magic")
             return line, cell
 
     # We delete these to avoid name conflicts for automagic to work
@@ -212,10 +212,11 b' potentially hold state in between calls, and that have full access to the main'
 IPython object:
     
 .. sourcecode:: python
-		
+
     # This code can be put in any Python module, it does not require IPython
     # itself to be running already.  It only creates the magics subclass but
     # doesn't instantiate it yet.
+    from __future__ import print_function
     from IPython.core.magic import (Magics, magics_class, line_magic,
                                     cell_magic, line_cell_magic)
 
@@ -226,8 +227,8 b' IPython object:'
         @line_magic
         def lmagic(self, line):
             "my line magic"
-            print "Full access to the main IPython object:", self.shell
-            print "Variables in the user namespace:", self.shell.user_ns.keys()
+            print("Full access to the main IPython object:", self.shell)
+            print("Variables in the user namespace:", list(self.shell.user_ns.keys()))
             return line
 
         @cell_magic
@@ -239,10 +240,10 b' IPython object:'
         def lcmagic(self, line, cell=None):
             "Magic that works both as %lcmagic and as %%lcmagic"
             if cell is None:
-                print "Called as line magic"
+                print("Called as line magic")
                 return line
             else:
-                print "Called as cell magic"
+                print("Called as cell magic")
                 return line, cell
 
 
@@ -259,11 +260,11 b' additional state, then you should always call the parent constructor and'
 instantiate the class yourself before registration:
 
 .. sourcecode:: python
-		
+
     @magics_class
     class StatefulMagics(Magics):
         "Magics that hold additional state"
-	
+
         def __init__(self, shell, data):
             # You must call the parent constructor
             super(StatefulMagics, self).__init__(shell)
@@ -288,8 +289,8 b' follows:'
 .. sourcecode:: python
 
     def func(self, line):
-        print "Line magic called with line:", line
-	print "IPython object:", self.shell
+        print("Line magic called with line:", line)
+        print("IPython object:", self.shell)
 
     ip = get_ipython()
     # Declare this function as the magic %mycommand
@@ -961,7 +962,7 b' standard Python tutorial::'
     In [3]: ... a, b = 0, 1
 
     In [4]: >>> while b < 10:
-       ...:     ...     print b
+       ...:     ...     print(b)
        ...:     ...     a, b = b, a+b
        ...:     
     1

docs/source/interactive/tips.rst

@@ -62,7 +62,7 b' mechanism, this is automatically stored::'
 
     hello - this is a temporary file
 
-    Out[1]: "print 'hello - this is a temporary file'\n"
+    Out[1]: "print('hello - this is a temporary file')\n"
 
 Now, if you call ``%edit -p``, IPython tries to open an editor with the
 same data as the last time you used %edit. So if you haven't used %edit
@@ -82,7 +82,7 b' Continuing with the example above, this should illustrate this idea::'
 
     hello - now I made some changes
 
-    Out[2]: "print 'hello - now I made some changes'\n"
+    Out[2]: "print('hello - now I made some changes')\n"
 
     In [3]: edit _1
 
@@ -94,7 +94,7 b' Continuing with the example above, this should illustrate this idea::'
 
     IPython version control at work :)
 
-    Out[3]: "print 'hello - this is a temporary file'\nprint 'IPython version control at work :)'\n"
+    Out[3]: "print('hello - this is a temporary file')\nprint('IPython version control at work :)')\n"
 
 
 This section was written after a contribution by Alexander Belchenko on