Fix bad HttpDate.format.

sdk/lib/io/http_date.dart

 // Copyright (c) 2012, the Dart project authors.  Please see the AUTHORS file
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
 part of dart.io;
 
 /**
  * Utility functions for working with dates with HTTP specific date
  * formats.
  */
@@ skipping 33 matching lines @@
 
     DateTime d = date.toUtc();
     StringBuffer sb = new StringBuffer()
         ..write(wkday[d.weekday - 1])
         ..write(", ")
         ..write(d.day.toString())
         ..write(" ")
         ..write(month[d.month - 1])
         ..write(" ")
         ..write(d.year.toString())
-        ..write(d.hour < 9 ? " 0" : " ")
+        ..write(d.hour <= 9 ? " 0" : " ")
         ..write(d.hour.toString())
-        ..write(d.minute < 9 ? ":0" : ":")
+        ..write(d.minute <= 9 ? ":0" : ":")
         ..write(d.minute.toString())
-        ..write(d.second < 9 ? ":0" : ":")
+        ..write(d.second <= 9 ? ":0" : ":")
         ..write(d.second.toString())
         ..write(" GMT");
     return sb.toString();
   }
 
   /**
    * Parse a date string in either of the formats
    * [RFC-1123](http://tools.ietf.org/html/rfc1123 "RFC-1123"),
    * [RFC-850](http://tools.ietf.org/html/rfc850 "RFC-850") or
    * ANSI C's asctime() format. These formats are listed here.
@@ skipping 236 matching lines @@
     int hour = toInt(timeList[0]);
     int minute = toInt(timeList[1]);
     int second = toInt(timeList[2]);
     if (hour > 23) error();
     if (minute > 59) error();
     if (second > 59) error();
 
     return new DateTime.utc(year, month, dayOfMonth, hour, minute, second, 0);
   }
 }