autopep8 --ignore=E501 fixes for chapter 5

(E501 = line too long)
I dislike how autopep8 breaks long lines,
and the lines weren't usually too long here.
Minor updates from new tool
autopep8 --ignore=E501 fixes.

The code in this chapter was already fixed so the
improvement is debatable.
autopep8 --ignore=E501 fixes.

The code in this chapter was already fixed so the
improvement is debatable.
autopep8 --ignore=E501 fixes. Marginal improvement.
autopep8 --ignore=E501 fixes. Paying off!
autopep8 --ignore=E501 fixes. Paying off!
autopep8 --ignore=E501 fixes. Marginal improvement.
autopep8 --ignore=E501 fixes. Paying off!
Merge branch 'chap6-style'
Merge branch 'chap5-style'
Merge branch 'chap4-style'
Merge branch 'chap3-style'
Merge branch 'chap2-style'
Merge branch 'chap1-style'
Merge branch 'misc-style'