Re: [PATCH v4 21/24] merge-recursive: split internal fields into a separate struct

Elijah Newren [off-list ref] writes:

merge_options has several internal fields that should not be set or read
by external callers.  This just complicates the API.  Move them into an
opaque merge_options_internal struct that is defined only in
merge-recursive.c and keep these out of merge-recursive.h.

Makes quite a lot of sense.  Thanks.