I was implementing a routine to show all the key bindings
when I discovered that we already have one. This fixes a few
small problems: 'n' prefix for number entry was missing for
number_pad mode. Meta+<direction> for running in number_pad
mode was missing too. ^A was present but being suppressed by
lack of #define for obsolete #if REDO. And ^C was shown as ^c
while all other ^ characters appear in upper case. Once ^A
appeared as the line before it, the inconsistency stood out.
I also changed the slightly verbose "Shift-<direction>" and
"Ctrl-<direction>" entries below the direction grid to use plus
instead of minus signs. Plus emphasizes that two things are
combined so seems more intuitive. (I left "M-c" alone.)
1bec4a66cd