Overhaul max/min functions (fixes bug #43712). Return logical class for logical inputs. Allow max (array, scalar) calls to proceed without creating a broadcast warning. Rewrite docstring. Add many more BIST tests to get 100% line coverage. * max.cc (do_minmax_bin_op<charNDArray>): Remove code protected by if (x.is_scalar_type()) which is never triggered by input. Check for scalar using numel() == 1 and call max function with array, scalar invocation. * max.cc (do_minmax_body): At end of function, cast retval to bool_array if both inputs were of bool type (bug #43712). * max.cc (Fmin, Fmax): Rewrite docstrings. Add BIST tests.

8728cf80b7d84b0ac401debac5b37217aac0d2e2 gnulib-hg