texmath-0.6.7: tests/writers/digit-bold.tex
\mathrm{\mathbf{0}\ \mathbf{1}\ \mathbf{2}\ \mathbf{3}\ \mathbf{4}\ \mathbf{5}\ \mathbf{6}\ \mathbf{7}\ \mathbf{8}\ \mathbf{9}\ }\mathrm{\mathbf{0}\ \mathbf{1}\ \mathbf{2}\ \mathbf{3}\ \mathbf{4}\ \mathbf{5}\ \mathbf{6}\ \mathbf{7}\ \mathbf{8}\ \mathbf{9}\ }