! err693_parse_curly.jnl
! the sub-routine defines a string variable containing commands for overlays in 
! different directions. the bug was that the parser doesn't handle quoted strings 
! inside { } if those strings include curly braces.
! The argument chooses one of the strings with commands and plots the overlay

use gt4d011

shade/i=100/l=1/pal=grayscale temp
go err693_parse_curly.sub yz

 shade/j=40/l=1/pal=grayscale temp
go err693_parse_curly.sub xz

