When a syntax error occurs, dashes are printed after the next prompt (>-----)

run test/data.  The string stuff is not read right;
it eats one char from the strings more for each element.

You can't interrupt between statements...

Doesn't take uppercase input!!!  test/henry

I/O is not implemented: test/histogram


When reading character input, the typist has to quote the string!!!
If you type a number, it barfs at you...   test/input

Typing "run program" doesn't load it and run it, it runs the
workspace and then gives a syntax error.


If you try to enter a number with a large exponent, it prints
"Exponent too large: 41" or whatever, where "41" is 1+ the exp
you typed.  e.g. "99e40".

"cont" won't continue after an error caused by Invalid Input
(hitting wrong key in numeric input)


Bug shown by test/prime:  int(n/i) comes out too low due to roundoff?
e.g. it thinks 8 is prime because 8/2 != int(8/2).