OMG... Rake.verbose returns Object.new if unset. Fixed by ruby/rake#567…

…, but until then, compare against true.

[git-p4: depot-paths = "//src/minitest/dev/": change = 14139]

lib/minitest/test_task.rb

@@ -114,7 +114,7 @@ def initialize name = :test # :nodoc:
       self.test_globs   = ["test/**/test_*.rb",
                            "test/**/*_test.rb"]
       self.test_prelude = nil
-      self.verbose      = Rake.application.options.trace || Rake.verbose
+      self.verbose      = Rake.application.options.trace || Rake.verbose == true
       self.warning      = true
     end