-// XBT_DEBUG("String is now: '%s'",b->data);
-/* XBT_DEBUG("Move end of string closer (%d chars moved) :\n-'%.*s%.*s'\n+'%.*s%s'",
- b->used - (end_subst - b->data) + 1,
- beg_subst-b->data,b->data,
- b->used-(end_subst-b->data)+1,beg_subst+val_len,
- beg_subst-b->data,b->data,
- end_subst);*/