From c0a2d322c692228a7574c39c7e173da4af0f34ea Mon Sep 17 00:00:00 2001
From: Takashi Kokubun <takashikkbn@gmail.com>
Date: Mon, 28 Dec 2020 23:03:04 -0800
Subject: Update help of sync-default-gems

---
 common.mk | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/common.mk b/common.mk
index aec160cbb5..b9103ab3db 100644
--- a/common.mk
+++ b/common.mk
@@ -1597,7 +1597,7 @@ help: PHONY
 	"  test-tool:           tests under the tool/test" \
 	"  update-gems:         download files of the bundled gems" \
 	"  update-bundled_gems: update the latest version of bundled gems" \
-	"  sync-default-gems:   sync default gems from upstream [GEM=<gem_name>]" \
+	"  sync-default-gems:   sync default gems from upstream [GEM=<gem_name git_ref>]" \
 	"  up:                  update local copy and autogenerated files" \
 	"  benchmark:           benchmark this ruby and COMPARE_RUBY." \
 	"  gcbench:             gc benchmark [GCBENCH_ITEM=<item_name>]" \
-- 
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