minor documentation gripes

[Dan Jacobson]

Looking around for things to bitch about :-) , we see

in *Help*:

C-h C-k runs the command Info-goto-emacs-key-command-node
   which is an interactive compiled Lisp function in `info'.
(Info-goto-emacs-key-command-node KEY)

Go to the Info node in the Emacs manual the command bound to KEY, a string.
-------I think the word 'for' is missing.

in .../NEWS:

Type M-x info-lookup-symbol to look up a symbol in the buffer at point.
------well, you could have mentioned it is bound to C-h TAB.
-- 
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