Re: show_help_echo truncates unconditionally

[Richard Stallman]

    ! /* Display help-echo property under the mouse pointer.  Either show it
    !    in the echo area or when non-nil call show-help-function to display
    !    it by other means (maybe in tooltips).

That is clear.  I will install it, assuming that it is correct, and I
hope someone else will fix it if it is wrong.  Thanks.

    PS: Some lines down this comment it says:
       and POS is the position in the overlay's buffer under the mouse.
    Is "under the mouse" correct?

There is no way to misunderstand it, no plausible but wrong other
meaning, so I see no problem.