#23 'E' keybinding wrong

[Dan Mergens]

The 'E' keybinding in command mode should move to the
last character of the next non-white space string of
characters. Instead it does what the 'B' keybinding
does which is to move to the first character of such a
sequence. Since the 'B' keybinding is not active, maybe
just use the implementation there? The 'e' keybinding
does the right thing.