Merge branch 'ab/commit-graph-write-progress'

The codepath to show progress meter while writing out commit-graph
file has been improved.

* ab/commit-graph-write-progress:
  commit-graph write: emit a percentage for all progress
  commit-graph write: add itermediate progress
  commit-graph write: remove empty line for readability
  commit-graph write: add more descriptive progress output
  commit-graph write: show progress for object search
  commit-graph write: more descriptive "writing out" output
  commit-graph write: add "Writing out" progress output
  commit-graph: don't call write_graph_chunk_extra_edges() unnecessarily
  commit-graph: rename "large edges" to "extra edges"

commit-graph.h

@@ -49,7 +49,7 @@ struct commit_graph {
 	const uint32_t *chunk_oid_fanout;
 	const unsigned char *chunk_oid_lookup;
 	const unsigned char *chunk_commit_data;
-	const unsigned char *chunk_large_edges;
+	const unsigned char *chunk_extra_edges;
 };
 
 struct commit_graph *load_commit_graph_one(const char *graph_file);