Add example to Enum.take docs using negative count.
Merge pull request #1596 from chrismccord/improve_enum_take_docs

Add example to Enum.take docs using negative count.
Add heredocs indentation test to DocTest
Make heredocs indentation test pass
Add mismatched indentation test to DocTest
Make mismatched indentation test pass
Add "too much" and "not enough" tests to DocTest
Remove unused variable from DocTest