The save function is not working for svg file format.

    #include "utils.h"
    #include "view.h"
    int main(int argc, char const *argv[]){

    Initialisation of the grid


    Definition of a scalar f to have something to plot

      scalar f[]; 
        f[] = sq(x)+sq(y)-1;

    We can dump the results, to see what the domain looks like.

      // dump("initial");

    We will represent the scalar f with the squares command

      squares("f", min = -1, max = 1);

    We save the results in a svg file. This line is not working and give the following error:

    basilisk/src/view.h:438: redraw_feedback: Assertion `p->history’ failed.

    We did get an svg file, but it is empty

      save(file = "test.svg", format = "svg");
      return 0;