- PDF417/MICROPDF417: use latch not ps shift for padding when

spanning Text segments to avoid affecting 1st char of 2nd segment
- PDF417/MICROPDF417: add optimized encoding, FAST_MODE for
  previous scheme; formatting changes
- common.c/h: add `cnt_digits()`, comments in include and make more
  consistent, minor code fiddling
- DOTCODE: replace `dc_n_digits()` with new `cnt_digits()`
- test_qr: fix `test_qr_perf()`
- composite: minor code fiddling
- library: debug dump HIBC-processed input
- BWIPP: update to latest

backend/dmatrix_trace.h

@@ -52,6 +52,7 @@ static void DM_TRACE_VertexToString(const unsigned char *source, const int lengt
         printf("char '%c' at %d mode %s", source[position], position, dm_smodes[edge->mode]);
     }
 }
+
 static void DM_TRACE_EdgeToString(char *buf, const unsigned char *source, const int length, struct dm_edge *edges,
             struct dm_edge *edge) {
     int previousMode = DM_TRACE_getPreviousMode(edges, edge);