From 517a17477564aa4ef4d0bf5d246dae4a94b618f7 Mon Sep 17 00:00:00 2001
From: Stan Lee <135666755+stanminlee@users.noreply.github.com>
Date: Mon, 11 May 2026 18:41:18 -0700
Subject: [PATCH] Update passes/techmap/clockgate.cc

Co-authored-by: greptile-apps[bot] <165735046+greptile-apps[bot]@users.noreply.github.com>
---
 passes/techmap/clockgate.cc | 5 +++--
 1 file changed, 3 insertions(+), 2 deletions(-)

diff --git a/passes/techmap/clockgate.cc b/passes/techmap/clockgate.cc
index 048ac8581..241f7cbb6 100644
--- a/passes/techmap/clockgate.cc
+++ b/passes/techmap/clockgate.cc
@@ -208,10 +208,11 @@ static void update_ff_activity_attr(Cell *cell, IdString attr_key, double new_cl
 	std::istringstream iss(cell->get_string_attribute(attr_key));
 	for (std::string tok; iss >> tok; ) {
 		if (tok.compare(0, 3, "EN=") == 0) continue; // remove EN from attribute
+		if (!out.empty()) out += " ";
 		if (tok.compare(0, 4, "CLK=") == 0)
-			out += stringf("CLK=%f ", new_clk_value); // Update CLK value
+			out += stringf("CLK=%f", new_clk_value); // Update CLK value
 		else
-			out += tok + " "; // All other values remain unchanged
+			out += tok; // All other values remain unchanged
 	}
 	cell->set_string_attribute(attr_key, out);
 }