From bfcc1e3c2c9966f06f8aac1db5b2af167f1bd9bd Mon Sep 17 00:00:00 2001
From: "Yukihiro \"Matz\" Matsumoto" <matz@ruby.or.jp>
Date: Thu, 13 Feb 2025 14:26:41 +0900
Subject: [PATCH] mruby-io: puts should print nothing for empty arrays

---
 mrbgems/mruby-io/mrblib/io.rb | 7 +++++--
 1 file changed, 5 insertions(+), 2 deletions(-)

diff --git a/mrbgems/mruby-io/mrblib/io.rb b/mrbgems/mruby-io/mrblib/io.rb
index dc787c4fa..b256acbe9 100644
--- a/mrbgems/mruby-io/mrblib/io.rb
+++ b/mrbgems/mruby-io/mrblib/io.rb
@@ -144,10 +144,14 @@ class IO
   def puts(*args)
     i = 0
     len = args.size
+    if len == 0
+      write "\n"
+      return
+    end
     while i < len
       s = args[i]
       if s.kind_of?(Array)
-        puts(*s)
+        puts(*s) if s.size > 0
       else
         s = s.to_s
         write s
@@ -155,7 +159,6 @@ class IO
       end
       i += 1
     end
-    write "\n" if len == 0
     nil
   end