Fix preliminary bugs encountered through the practice PE.

[andrewtanJS]

These changes encompass the preliminary bug squishes to fix issues in the code and documentation encountered in the practice PE.

[coveralls]

Pull Request Test Coverage Report for Build 224

• 0 of 0 changed or added relevant lines in 0 files are covered.
• No unchanged relevant lines lost coverage.
• Overall coverage decreased (-0.03%) to 77.55%

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Totals
Change from base Build 220:	-0.03%
Covered Lines:	1855
Relevant Lines:	2392

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💛 - Coveralls

[yogtew]

Looks good, thanks!