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-merge API
-=========
-
-The merge API helps a program to reconcile two competing sets of
-improvements to some files (e.g., unregistered changes from the work
-tree versus changes involved in switching to a new branch), reporting
-conflicts if found.  The library called through this API is
-responsible for a few things.
-
- * determining which trees to merge (recursive ancestor consolidation);
-
- * lining up corresponding files in the trees to be merged (rename
-   detection, subtree shifting), reporting edge cases like add/add
-   and rename/rename conflicts to the user;
-
- * performing a three-way merge of corresponding files, taking
-   path-specific merge drivers (specified in `.gitattributes`)
-   into account.
-
-Data structures
----------------
-
-* `mmbuffer_t`, `mmfile_t`
-
-These store data usable for use by the xdiff backend, for writing and
-for reading, respectively.  See `xdiff/xdiff.h` for the definitions
-and `diff.c` for examples.
-
-* `struct ll_merge_options`
-
-Check ll-merge.h for details.
-
-Low-level (single file) merge
------------------------------
-
-Check ll-merge.h for details.