Prefer single quotes over double quotes for strings, in a consistent way
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Trailing spaces can increase costs
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Missing spaces can increase costs
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Extraneous whitespaces increase costs
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Alias agreement for imports can reduce costs
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Multiple imports on the same line can increase costs
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Using “is” for anything but singleton can increase costs
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‘Not…is’ syntax can be unreadable
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Explicit comparison to singleton can be unreadable
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Too many classes without same name as file name can increase costs
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