* lib/optparse.rb (OptionParser#order, #permute, #parse): allow an

array as argument.

* test/ruby/test_*.rb: moved invariants to left side in
  assert_equal, and use assert_nil, assert_raises and so on.


git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@4516 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

test/ruby/test_trace.rb

@@ -8,16 +8,16 @@ class TestTrace < Test::Unit::TestCase
     $y = 0
     trace_var :$x, proc{$y = $x}
     $x = 40414
-    assert_equal($y, $x)
-    
+    assert_equal($x, $y)
+
     untrace_var :$x
     $x = 19660208
     assert($y != $x)
-    
+
     trace_var :$x, proc{$x *= 2}
     $x = 5
-    assert_equal($x, 10)
-    
+    assert_equal(10, $x)
+
     untrace_var :$x
-  end 
+  end
 end