Fix Date specs

We're still in the last commercial week of 2009, so fix the date
specs so they don't break on this case

spec/ruby/library/date/strptime_spec.rb

@@ -79,16 +79,16 @@
 
   it "should be able to show the week number with the week starting on sunday and monday" do
     d = Date.today
-    Date.strptime("14", "%U").should == Date.commercial(d.cwyear, 14, 7)
-    Date.strptime("14", "%W").should == Date.commercial(d.cwyear, 15, 7)
+    Date.strptime("14", "%U").should == Date.commercial(d.cwyear, d.cweek, 7) + 7 * 13
+    Date.strptime("14", "%W").should == Date.commercial(d.cwyear, d.cweek, 7) + 7 * 14
   end
 
   it "should be able to show the commercial week day" do
     Date.strptime("2008 1", "%G %u").should == Date.civil(2007, 12, 31)
   end
 
   it "should be able to show the commercial week" do
-    d = Date.commercial(Date.today.year,1,1)
+    d = Date.commercial(Date.today.cwyear,1,1)
     Date.strptime("1", "%V").should == d
     Date.strptime("15", "%V").should == Date.commercial(d.cwyear, 15, 1)
   end