- os << "<mo form='prefix' fence='true' stretchy='true' symmetric='true' lspace='thinmathspace'>"
+ // lspace='3/18em', but fractions are not allowed.
+ ms << MTagInline("mo", "form='prefix' fence='true' stretchy='true' symmetric='true' lspace='0.1666em'")
for (col_type col = 0; col < ncols(); ++col) {
idx_type const i = index(row, col);
if (cellinfo(i).multi != CELL_PART_OF_MULTICOLUMN) {
for (col_type col = 0; col < ncols(); ++col) {
idx_type const i = index(row, col);
if (cellinfo(i).multi != CELL_PART_OF_MULTICOLUMN) {