rerere.c: use error_errno() and warning_errno()

Signed-off-by: Nguyễn Thái Ngọc Duy <pclouds@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>

rerere.c

@@ -351,8 +351,7 @@ static int handle_file(const char *path, unsigned char *sha1, const char *output
 		error("There were errors while writing %s (%s)",
 		      path, strerror(io.io.wrerror));
 	if (io.io.output && fclose(io.io.output))
-		io.io.wrerror = error("Failed to flush %s: %s",
-				      path, strerror(errno));
+		io.io.wrerror = error_errno("Failed to flush %s", path);
 
 	if (hunk_no < 0) {
 		if (output)
@@ -614,20 +613,17 @@ static int merge(const struct rerere_id *id, const char *path)
 	 * Mark that "postimage" was used to help gc.
 	 */
 	if (utime(rerere_path(id, "postimage"), NULL) < 0)
-		warning("failed utime() on %s: %s",
-			rerere_path(id, "postimage"),
-			strerror(errno));
+		warning_errno("failed utime() on %s",
+			      rerere_path(id, "postimage"));
 
 	/* Update "path" with the resolution */
 	f = fopen(path, "w");
 	if (!f)
-		return error("Could not open %s: %s", path,
-			     strerror(errno));
+		return error_errno("Could not open %s", path);
 	if (fwrite(result.ptr, result.size, 1, f) != 1)
-		error("Could not write %s: %s", path, strerror(errno));
+		error_errno("Could not write %s", path);
 	if (fclose(f))
-		return error("Writing %s failed: %s", path,
-			     strerror(errno));
+		return error_errno("Writing %s failed", path);
 
 out:
 	free(cur.ptr);
@@ -842,7 +838,7 @@ static int rerere_forget_one_path(const char *path, struct string_list *rr)
 	if (unlink(filename))
 		return (errno == ENOENT
 			? error("no remembered resolution for %s", path)
-			: error("cannot unlink %s: %s", filename, strerror(errno)));
+			: error_errno("cannot unlink %s", filename));
 
 	/*
 	 * Update the preimage so that the user can resolve the