raise_exception default to Exception rather than nil.

Author: ioquatix

lib/sus/raise_exception.rb

@@ -5,7 +5,7 @@
 
 module Sus
 	class RaiseException
-		def initialize(exception_class = nil, message: nil)
+		def initialize(exception_class = Exception, message: nil)
 			@exception_class = exception_class
 			@message = message
 			@predicate = nil

test/sus/raise_exception.rb

@@ -21,6 +21,7 @@ def initialize(age)
 
 	it "can not raise an exception" do
 		expect do
+			# Nothing.
 		end.not.to raise_exception
 	end