Disable autocall by default, after feedback on the mailing list.

Also removed a redundant autocall help string and the text about the
default value, since our config system auto-generates default info.

IPython/core/interactiveshell.py

@@ -188,16 +188,6 b' class ReadlineNoRecord(object):'
         ghi = self.shell.readline.get_history_item
         return [ghi(x) for x in range(start, end)]
 
-
-_autocall_help = """
-Make IPython automatically call any callable object even if
-you didn't type explicit parentheses. For example, 'str 43' becomes 'str(43)'
-automatically. The value can be '0' to disable the feature, '1' for 'smart'
-autocall, where it is not applied if there are no more arguments on the line,
-and '2' for 'full' autocall, where all callable objects are automatically
-called (even if no arguments are present). The default is '1'.
-"""
-
 #-----------------------------------------------------------------------------
 # Main IPython class
 #-----------------------------------------------------------------------------
@@ -207,7 +197,7 b' class InteractiveShell(SingletonConfigurable, Magic):'
 
     _instance = None
 
-    autocall = Enum((0,1,2), default_value=1, config=True, help=
+    autocall = Enum((0,1,2), default_value=0, config=True, help=
         """
         Make IPython automatically call any callable object even if you didn't
         type explicit parentheses. For example, 'str 43' becomes 'str(43)'
@@ -215,7 +205,6 b' class InteractiveShell(SingletonConfigurable, Magic):'
         'smart' autocall, where it is not applied if there are no more
         arguments on the line, and '2' for 'full' autocall, where all callable
         objects are automatically called (even if no arguments are present).
-        The default is '1'.
         """
     )
     # TODO: remove all autoindent logic and put into frontends.