It is on -tip if you want :)
So, unless someone is opposed to. I will send a patch which define
three possible values
for the print_line callback. I will define these values on trace.h
Why not:
#define TRACE_TYPE_PARTIAL_LINE 0
#define TRACE_TYPE_HANDLED 1
#define TRACE_TYPE_UNHANDLED 2 => will relay on default functions
Hmm I'm questionning about the relevance of this kind of patch since
the tracing API is in refactoring...
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