Add a space before seconds units like all other units.

base/time/time.cc

 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "base/time/time.h"
 
 #include <cmath>
 #include <ios>
 #include <limits>
 #include <ostream>
@@ skipping 108 matching lines @@
     return rv.ValueOrDie();
   // Negative RHS overflows. Positive RHS underflows.
   if (value < 0)
     return std::numeric_limits<int64_t>::max();
   return -std::numeric_limits<int64_t>::max();
 }
 
 }  // namespace time_internal
 
 std::ostream& operator<<(std::ostream& os, TimeDelta time_delta) {
-  return os << time_delta.InSecondsF() << "s";
+  return os << time_delta.InSecondsF() << " s";
 }
 
 // Time -----------------------------------------------------------------------
 
 // static
 Time Time::FromTimeT(time_t tt) {
   if (tt == 0)
     return Time();  // Preserve 0 so we can tell it doesn't exist.
   if (tt == std::numeric_limits<time_t>::max())
     return Max();
@@ skipping 197 matching lines @@
   return is_in_range(month, 1, 12) &&
          is_in_range(day_of_week, 0, 6) &&
          is_in_range(day_of_month, 1, 31) &&
          is_in_range(hour, 0, 23) &&
          is_in_range(minute, 0, 59) &&
          is_in_range(second, 0, 60) &&
          is_in_range(millisecond, 0, 999);
 }
 
 }  // namespace base