Support 2-arity options for Calendar.strftime/3 #14247
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This PR introduces support for 2-arity functions for
Calendar.strftime/3options per this proposal.The result is that the options functions may be 1-arity and receive the term to be processed or 2-arity in which case they receive both the term and the datetime argument to
Calendar.strftime/3.The function documentation is updated but may well benefit from further work.
A single test case is added to verify that 2-arity functions are supported, and that the datetime is correctly passed to them. All tests are passing.