Avoid code smells and improve readability in method bodies.

Author: yegor256

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+We don't use blank lines inside method bodies because they reduce code readability: https://www.yegor256.com/2014/11/03/empty-line-code-smell.html
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+We don't use comments inside method bodies, because inline and between-line comments negatively affect readability.
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+We avoid compound variable names, as they make the code harder to read; we prefer single-word nouns for variable names: https://www.yegor256.com/2015/01/12/compound-name-is-code-smell.html
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+We design our tests to contain only one assertion.
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+Each test ends with an assertion—there is no code after it.