nobu	2014-08-25 13:03:33 +0900 (Mon, 25 Aug 2014)

  New Revision: 47272

  http://svn.ruby-lang.org/cgi-bin/viewvc.cgi?view=revision&revision=47272

  Log:
    logger.rb: simplify
    
    * lib/logger.rb (format_datetime): simplify and freeze the default
      format so that it can be shared.

  Modified files:
    trunk/lib/logger.rb
Index: lib/logger.rb
===================================================================
--- lib/logger.rb	(revision 47271)
+++ lib/logger.rb	(revision 47272)
@@ -510,11 +510,7 @@ private https://github.com/ruby/ruby/blob/trunk/lib/logger.rb#L510
   private
 
     def format_datetime(time)
-      if @datetime_format.nil?
-        time.strftime("%Y-%m-%dT%H:%M:%S.%6N ")
-      else
-        time.strftime(@datetime_format)
-      end
+      time.strftime(@datetime_format || "%Y-%m-%dT%H:%M:%S.%6N ".freeze)
     end
 
     def msg2str(msg)

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