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Rationale: a hard limit of 80, while well intended, often results in less readable
code. At least one outcome is that developers will give shorter and less clear
names to variables. You can observe that it has happened in this codebase.
There seems to be no general consensus on what should be a hard limit, with the
discussion ranging mostly between 80 and 120, thus 120 is chosen here as
the hard cut off.
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