Evaluated each assert line without a replacement test specified.

src/about_exceptions.rb

@@ -22,12 +22,12 @@ class AboutExceptions < EdgeCase::Koan
 
     assert_equal __(:exception_handled), result
 
-    assert ex.is_a?(StandardError), "Failure message."
-    assert ex.is_a?(RuntimeError), "Failure message."
+    assert ex.is_a?(___(StandardError)), "Failure message."
+    assert ex.is_a?(___(RuntimeError)), "Failure message."
 
-    assert RuntimeError.ancestors.include?(StandardError),
+    assert RuntimeError.ancestors.include?(StandardError), # __
       "RuntimeError is a subclass of StandardError"
-    
+
     assert_equal __("Oops"), ex.message
   end
 
@@ -58,7 +58,7 @@ class AboutExceptions < EdgeCase::Koan
   end
 
   # Sometimes, we must know about the unknown
-  def test_asserting_an_error_is_raised
+  def test_asserting_an_error_is_raised # __
     # A do-end is a block, a topic to explore more later
     assert_raise(___(MySpecialError)) do
       raise MySpecialError.new("New instances can be raised directly.")