>
   <td style="text-align:left;"> reading-data-from-a-file-20 </td>
   <td style="text-align:left;"> exercise </td>
   <td style="text-align:left;"> read_csv(file = "data/test_7.csv", col_types = cols(
           grade = col_integer(),
           student = col_character()
         )) </td>
  </tr>
  <tr>
   <td style="text-align:left;"> reading-data-from-a-file-21 </td>
   <td style="text-align:left;"> exercise </td>
   <td style="text-align:left;"> read_csv("data/test_bad_names.csv", name_repai