Section 5.4.4 - Running the Evaluator
Exercise 5.26 - stack analysis of iterative factorial
Exercise 5.27 - stack analysis of recursive factorial, and comparison with iterative
Exercise 5.28 - disabling tail recursion, without modifying ch5-eceval.scm!
refactoring, inspired by my 5.28 override, thus restoring ch5-eceval controller text to its pristine state (aside from my refactoring)
Exercise 5.29 - stack analysis of recursive Fibonacci. this is NOT the last time! see Exercise 5.46