Real den = (count * sqx - sqr (sx));
if (!count || !den)
{
- programming_error ("minimise_least_squares (): Nothing to minimise");
+ programming_error ("minimise_least_squares (): Nothing to minimise\n"
+ "This means that vertical spacing is triggered\n"
+ "before line breaking\n");
*coef = 0.0;
*offset = count ? sy / count : 0.0;
}