Add option to just print history, with no added timestamps or line numbers

[Dan Jacobson]

$ help history
should mention how in the world one is supposed to just print the plain history,
without any line numbers or time stamps.

You might say, "Just strip it off with perl or sed." Well, fine. Then mention 
that in help history.

Currently one needs massive superfund environmental clean-up effort 
workarounds, e.g.,
$ HISTTIMEFORMAT=' ' history | perl -pwle 's/^\s+\S+\s+//'

Better yet, add a
history -j: Just print history, with no added timestamps or line numbers, etc.

Or OK, there's HISTTIMEFORMAT. How about also a HISTFORMAT (default " %5n %t 
%h\n" or whatever,) so one could use "%h\n" for "just give me the history item."