https://git.ruby-lang.org/ruby.git/commit/?id=fe03bbaf34

From fe03bbaf3405b9e45bb3504fab5f4195ec6c3630 Mon Sep 17 00:00:00 2001
From: Nobuyoshi Nakada <nobu@r...>
Date: Mon, 1 Jul 2019 10:16:47 +0900
Subject: bootstraptest/runner.rb (show_limit): show dots only when printing to
 a tty


diff --git a/bootstraptest/runner.rb b/bootstraptest/runner.rb
index 8fce3d4..7786faa 100755
--- a/bootstraptest/runner.rb
+++ b/bootstraptest/runner.rb
@@ -265,11 +265,10 @@ end https://github.com/ruby/ruby/blob/trunk/bootstraptest/runner.rb#L265
 
 def show_limit(testsrc, opt = '', **argh)
   result = get_result_string(testsrc, opt, **argh)
-  $stderr.print '.'
-  $stderr.print @reset
-  $stderr.puts if @verbose
-
   if @tty
+    $stderr.print '.'
+    $stderr.print @reset
+    $stderr.puts if @verbose
     $stderr.puts "#{erase}#{result}"
   else
     @errbuf.push result
-- 
cgit v0.10.2


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