read-cache: fix indentation in read_index_from

Signed-off-by: Stefan Beller <sbeller@google.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>

read-cache.c

@@ -1654,7 +1654,7 @@ int read_index_from(struct index_state *istate, const char *path)
 		die("broken index, expect %s in %s, got %s",
 		    sha1_to_hex(split_index->base_sha1),
 		    git_path("sharedindex.%s",
-				     sha1_to_hex(split_index->base_sha1)),
+			     sha1_to_hex(split_index->base_sha1)),
 		    sha1_to_hex(split_index->base->sha1));
 	merge_base_index(istate);
 	check_ce_order(istate);