https://git.ruby-lang.org/ruby.git/commit/?id=5a7b4dba26

From 5a7b4dba26e29f5942265267688625b5be174064 Mon Sep 17 00:00:00 2001
From: Yusuke Endoh <mame@r...>
Date: Wed, 17 Nov 2021 23:38:19 +0900
Subject: node.c (dump_node): trivial refactoring

---
 node.c | 4 +---
 1 file changed, 1 insertion(+), 3 deletions(-)

diff --git a/node.c b/node.c
index cd1c3f0b0ab..548e4f9fe1f 100644
--- a/node.c
+++ b/node.c
@@ -677,10 +677,8 @@ dump_node(VALUE buf, VALUE indent, int comment, const NODE * node) https://github.com/ruby/ruby/blob/trunk/node.c#L677
 	ANN("format: $[nd_nth]");
 	ANN("example: $&, $`, $', $+");
 	F_CUSTOM1(nd_nth, "variable") {
-	    char name[3];
-	    name[0] = '$';
+	    char name[3] = "$ ";
 	    name[1] = (char)node->nd_nth;
-	    name[2] = '\0';
 	    A(name);
 	}
 	return;
-- 
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