* lib/optparse.rb: get rid of warnings.

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@3838 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

lib/optparse/date.rb

@@ -0,0 +1,17 @@
+require 'optparse'
+require 'date'
+
+OptionParser.accept(DateTime) do |s,|
+  begin
+    DateTime.parse(s) if s
+  rescue ArgumentError
+    raise OptionParser::InvalidArgument, s
+  end
+end
+OptionParser.accept(Date) do |s,|
+  begin
+    DateTime.parse(s) if s
+  rescue ArgumentError
+    raise OptionParser::InvalidArgument, s
+  end
+end