Merge pull request #4811 from ivanov/cm-typos

document code mirror tab and shift-tab

docs/source/interactive/cm_keyboard.rst

@@ -7,11 +7,13 b' Because each cell of the IPython notebook is powered by Codemirror,'
 you can actually use a set of predetermined keyboard shortcuts to
 write and manipulate your content easily:
 
-=================  ==============  ==================
+==================  ==============  ==================
 Action             PC shortcut     Mac shortcut      
-=================  ==============  ==================
+==================  ==============  ==================
 newline & indent   Enter           Enter             
 toggle overwrite   Insert          Insert            
+code completion     Tab             Tab
+help introspection  Shift-Tab       Shift-Tab
 indent             Ctrl-]          Cmd-]             
 dedent             Ctrl-[          Cmd-[             
 select all         Ctrl-A          Cmd-A             
@@ -34,9 +36,9 b' go to line end End End'
 del word before    Ctrl-Backspace  Alt-Backspace     
 del word after     ---             Ctrl-Alt-Backspace
 del word after     Ctrl-Delete     Alt-Delete        
-=================  ==============  ==================
+==================  ==============  ==================
 
 .. note::
 
-     These shorcuts are valid for US keyboards, so some shortcuts can change
+     These shortcuts are valid for US keyboards, so some shortcuts can change
      for non-US keyboards.