Bug #4368: MiniTest::Assertions#assert_block ignores the given message.
http://redmine.ruby-lang.org/issues/show/4368

Author: Nobuyoshi Nakada
Status: Assigned, Priority: Normal
Assigned to: Ryan Davis, Category: lib, Target version: 1.9.2
ruby -v: r30784

This method ignores the argument.

    def assert_block msg = nil
      assert yield, "Expected block to return true value."
    end


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