  --> [ local path prefix ]/spec_init/duplicate_phase.fpp:10:3
   |
10 | /   phase 0 """
11 | |   c phase 0
12 | |   """
   | |_____^ duplicate init specifier for phase 0
   |
  ::: [ local path prefix ]/spec_init/duplicate_phase.fpp:7:3
   |
 7 | /   phase 0 """
 8 | |   c phase 0
 9 | |   """
   | |_____- previous occurrence is here

