[Orgmode] dangling clock message might be incomprehensible to a few users

[Samuel Wales]

A possible documentation suggestion.

I restarted emacs without clocking out first and got a dangling clock
query.  It had no help.

It did not appear in the messages buffer.

Here is part of it:

                                           " [(kK)p (sS)ub (C)ncl (i)gn]? ")

Some users might ask:

kp=?  Keep?  Keep what?
sub=subtract what from what?
cncl=cancel command?  Why "C" only?
ign=ignore what?   Why "i" only?

Thanks.

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