akr	2011-11-19 19:48:22 +0900 (Sat, 19 Nov 2011)

  New Revision: 33791

  http://svn.ruby-lang.org/cgi-bin/viewvc.cgi?view=rev&revision=33791

  Log:
    update doc.

  Modified files:
    trunk/time.c

Index: time.c
===================================================================
--- time.c	(revision 33790)
+++ time.c	(revision 33791)
@@ -1799,7 +1799,7 @@
 struct time_object {
     wideval_t timew; /* time_t value * TIME_SCALE.  possibly Rational. */
     struct vtm vtm;
-    int gmt;
+    int gmt; /* 0:utc 1:localtime 2:fixoff */
     int tm_got;
 };
 
@@ -2496,6 +2496,8 @@
  *  can be Integer, Float, Rational, or other Numeric.
  *  non-portable feature allows the offset to be negative on some systems.
  *
+ *  If a numeric argument is given, the result is in local time.
+ *
  *     Time.at(0)            #=> 1969-12-31 18:00:00 -0600
  *     Time.at(Time.at(0))   #=> 1969-12-31 18:00:00 -0600
  *     Time.at(946702800)    #=> 1999-12-31 23:00:00 -0600

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