Blank lines

One can freely enter blank lines to set off certain sections and enhance readability.  For example in commentdol.gms I have 2 blank lines.

set a /a1,a2/;

set b /a2,c2/;

set c /a3,d3/;

parameter d(a,b,c);

d(a,b,c)=1.234567;

option d:1;display d;

option eject;