message: Make example table prettier.
diff: @@ -101,7 +101,7 @@ SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  *
  * <table align="center" width="90%">
  * <tr valign="top">
  - * <td width="100px">@ref simple_solver</td>
  + * <td width="260px">@ref simple_solver</td>
  * <td> Simple solver. A minimal CG solver in Ginkgo. Read matrix from a file.
  * </td></tr>
  *
  