 --> [ local path prefix ]/command/duplicate_opcode_explicit.fpp:5:3
  |
5 |   sync command C2 opcode 0x10
  |   ^^^^^^^^^^^^^^^^^^^^^^^^^^^ duplicate opcode value (16 dec, 10 hex)
  |
 ::: [ local path prefix ]/command/duplicate_opcode_explicit.fpp:3:3
  |
3 |   sync command C1 opcode 0x10
  |   --------------------------- previous occurrence is here

