doc/figs/example-shift.txt

   1 .----------------.
   2 |    State 3     |
   3 | 1 exp: a . ";" |
   4 `----------------'
   5         |
   6         | ";"
   7         |
   8         v
   9 .----------------.
  10 |    State 6     |
  11 | 1 exp: a ";" . |
  12 `----------------'