Generator coverage test CellML file: removed the n-ary tests for the "minus" and "divide" elements.
Generator coverage test CellML file: removed the n-ary tests for the "minus" and "divide" elements.

Indeed, those elements are binary arithmetic operators, not n-ary ones.

hsorby/libcellml,hsorby/libcellml,cellml/libcellml,hsorby/libcellml,nickerso/libcellml,nickerso/libcellml,cellml/libcellml,MichaelClerx/libcellml,MichaelClerx/libcellml,cellml/libcellml,MichaelClerx/libcellml,nickerso/libcellml,hsorby/libcellml,nickerso/libcellml,cellml/libcellml