Unit test: programlisting.008

This test checks that the line numbering control PIs are handled correctly.

   |Line one
 2 |Line two
   |Line three
 4 |Line four
   |Line five
 6 |Line six
   |Line seven
 8 |Line eight
   |Line nine
10 |Line ten
   |Line eleven
12 |Line twelve
   |Line thirteen
14 |Line fourteen
   |Line fifteen
16 |Line sixteen

  |Line one
  |Line two
  |Line three
  |Line four
  |Line five
  |Line six
  |Line seven
  |Line eight
  |Line nine