From 6b75ec92a7d967ebf0eefd25abaa9c5254884fbf Mon Sep 17 00:00:00 2001
From: Liu-Cheng Xu <xuliuchengxlc@gmail.com>
Date: Tue, 27 Jul 2021 16:43:27 +0800
Subject: [PATCH] More readable help for --sync option (#9441)

---
 substrate/client/cli/src/params/network_params.rs | 11 +++++++----
 1 file changed, 7 insertions(+), 4 deletions(-)

diff --git a/substrate/client/cli/src/params/network_params.rs b/substrate/client/cli/src/params/network_params.rs
index 185a93f66b3..dd2e09e4a8c 100644
--- a/substrate/client/cli/src/params/network_params.rs
+++ b/substrate/client/cli/src/params/network_params.rs
@@ -128,10 +128,13 @@ pub struct NetworkParams {
 	pub ipfs_server: bool,
 
 	/// Blockchain syncing mode.
-	/// Full - Download and validate full blockchain history (Default).
-	/// Fast - Download blocks and the latest state only.
-	/// FastUnsafe - Same as Fast, but do skips downloading state proofs.
-	#[structopt(long, default_value = "Full")]
+	///
+	/// - `Full`: Download and validate full blockchain history.
+	///
+	/// - `Fast`: Download blocks and the latest state only.
+	///
+	/// - `FastUnsafe`: Same as `Fast`, but skip downloading state proofs.
+	#[structopt(long, value_name = "SYNC_MODE", default_value = "Full")]
 	pub sync: SyncMode,
 }
 
-- 
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