Yanking into the Stack
======================

The `C-y' command yanks the most recently killed text back into the
Calculator.  It pushes this value onto the top of the stack regardless
of the cursor position.  In general it re-parses the killed text as a
number or formula (or a list of these separated by commas or
newlines).  However if the thing being yanked is something that was
just killed from the Calculator itself, its full internal structure is
yanked.  For example, if you have set the floating-point display mode
to show only four significant digits, then killing and re-yanking
3.14159 (which displays as 3.142) will yank the full 3.14159, even
though yanking it into any other buffer would yank the number in its
displayed form, 3.142.  (Since the default display modes show all
objects to their full precision, this feature normally makes no
difference.)