Deactivate tooltip on tab by default.

Codepath is **not** removed by this.

docs/source/whatsnew/pr/tooltip-on-tab.rst

@@ -0,0 +1,4 b''
+ * In notebook, Showing tooltip on tab has been deactivated by default to avoid
+   conflict with completion, and will be completly removed in future version.
+   Shift-Tab could still be used to invoke tooltip when inside function
+   signature and/or on selection.

IPython/html/static/notebook/js/config.js

@@ -1,80 +1,79 b''
 //----------------------------------------------------------------------------
 //  Copyright (C) 2012  The IPython Development Team
 //
 //  Distributed under the terms of the BSD License.  The full license is in
 //  the file COPYING, distributed as part of this software.
 //----------------------------------------------------------------------------
 
 //============================================================================
 // Notebook
 //============================================================================
 
 /**
  * @module IPython
  * @namespace IPython
  **/
 
 var IPython = (function (IPython) {
     "use strict";
         /**
          * A place where some stuff can be confugured.
          *
          * @class config
          * @static
          *
          **/
     var default_config = {
         /**
          * Dictionary of object to autodetect highlight mode for code cell.
          * Item of the dictionnary should take the form :
          *
          *     key : {'reg':[list_of_regexp]}
          *
          * where `key` will be the code mirror mode name
          * and `list_of_regexp` should be a list of regext that should match
          * the first line of the cell to trigger this mode.
          *
          * if `key` is prefixed by the `magic_` prefix the codemirror `mode`
          * will be applied only at the end of the first line
          *
          * @attribute cell_magic_highlight
          * @example
          * This would trigger javascript mode
          * from the second line if first line start with `%%javascript` or `%%jsmagic`
          *
          *     cell_magic_highlight['magic_javascript'] = {'reg':[/^%%javascript/,/^%%jsmagic/]}
          * @example
          * This would trigger javascript mode
          * from the second line if first line start with `var`
          *
          *     cell_magic_highlight['javascript'] = {'reg':[/^var/]}
          */
         cell_magic_highlight : {
               'magic_javascript'    :{'reg':[/^%%javascript/]}
              ,'magic_perl'          :{'reg':[/^%%perl/]}
              ,'magic_ruby'          :{'reg':[/^%%ruby/]}
              ,'magic_python'        :{'reg':[/^%%python3?/]}
              ,'magic_shell'         :{'reg':[/^%%bash/]}
              ,'magic_r'             :{'reg':[/^%%R/]}
              ,'magic_text/x-cython' :{'reg':[/^%%cython/]}
             },
 
         /**
          * same as `cell_magic_highlight` but for raw cells
          * @attribute raw_cell_highlight
          */
         raw_cell_highlight : {
              'diff'         :{'reg':[/^diff/]}
             },
 
-        tooltip_on_tab : true,
         };
 
     // use the same method to merge user configuration
     IPython.config = {};
     $.extend(IPython.config, default_config);
 
     return IPython;
 
 }(IPython));