ChangeLog compatibility [ci skip]

* tool/vcs.rb (VCS::GIT#export_changelog): improve the
  compatibility with svn-log.
  remained differences are:

  - in svn-log

    - accented characters, left/right single quotation marks, and
      non-break spaces are translated to ASCII characters

    - other non-ASCII characters are excoded as `{U+XXXX}`

  - in git-log

    - tabs are expanded

  - in git-log (intentional)

    - lines looking too indented are unindented

    - empty lines between headers and bodies are squeezed

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@65970 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

tool/vcs.rb

@@ -480,10 +480,13 @@ class VCS
             s.sub!(/^git-svn-id: .*@(\d+) .*\n+\z/, '')
             rev = $1
             s.gsub!(/^ {8}/, '') if /^(?! {8}|$)/ !~ s
+            s.sub!(/\n\n\z/, "\n")
             if /\A(\d+)-(\d+)-(\d+)/ =~ time
               date = Time.new($1.to_i, $2.to_i, $3.to_i).strftime("%a, %d %b %Y")
             end
-            w.puts "r#{rev} | #{author} | #{time} (#{date}) | #{s.count("\n")} lines\n\n"
+            lines = s.count("\n")
+            lines = "#{lines} line#{lines == 1 ? '' : 's'}"
+            w.puts "r#{rev} | #{author} | #{time} (#{date}) | #{lines}\n\n"
             w.puts s, sep
           end
         end