Fixes the first test in about_iteration.rb
Fixes def test_iterating_with_each -  
def test_collect_transforms_elements_of_an_array. I learned:

* You can iterate with .each by using either "do" ... or "each {" ...

* "break if" will kill the iteration at the point.

* .collect & .map iterate and collect information with changes (ex |x| x + 10)

[#65851866]
Fixes def test_select_selects_certain_items_from_an_array - 
the bonus question. I learned:

* .select and .find_all are similar -- they select certain elements of the array.

* .find selects the first element matching a criteria in the array.

* .inject injects a number to start your iteration. Ex:

result = [2, 3, 4].inject(0) { |sum, item| sum + item } # the 0 is the first sum
result = 9

* Ranges can act like a collection and call methods to act in the same way 
they would towards arrays

* Files can act like a collection of lines. 

*  We use do |file| file ... in the koans example so we can strip
whitespace in every line, making for a more readable answer.

[#65851866]