https://git.ruby-lang.org/ruby.git/commit/?id=48f1a38f23

From 48f1a38f23f9a544e71c5656c83c419c064509fd Mon Sep 17 00:00:00 2001
From: Nobuyoshi Nakada <nobu@r...>
Date: Mon, 26 Aug 2019 18:21:04 +0900
Subject: Limit ChangeLog entries

Since the previous release date, when the starting message is not
found.

diff --git a/tool/lib/vcs.rb b/tool/lib/vcs.rb
index 15ec4c1..db0af88 100644
--- a/tool/lib/vcs.rb
+++ b/tool/lib/vcs.rb
@@ -572,9 +572,14 @@ class VCS https://github.com/ruby/ruby/blob/trunk/tool/lib/vcs.rb#L572
       unless $?.success?
         raise "need notes/commits tree; run `git fetch origin refs/notes/commits:refs/notes/commits` in the repository"
       end
-      range = [from, (to || 'HEAD')].compact.join('^..')
-      cmd_pipe({'TZ' => 'JST-9', 'LANG' => 'C', 'LC_ALL' => 'C'},
-               %W"#{COMMAND} log --format=medium --notes=commits --date=iso-local --topo-order #{range}", "rb") do |r|
+      cmd = %W"#{COMMAND} log --format=medium --notes=commits --date=iso-local --topo-order"
+      to ||= 'HEAD'
+      if from
+        cmd.push("#{from}^..#{to}")
+      else
+        cmd.push("--since=25 Dec 00:00:00", to)
+      end
+      cmd_pipe({'TZ' => 'JST-9', 'LANG' => 'C', 'LC_ALL' => 'C'}, cmd, "rb") do |r|
         format_changelog(r, path)
       end
     end
-- 
cgit v0.10.2


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