version.m: Use more Octave coding standards. * version.m: Improve docstring. Match variables in function prototype to those in documentation. Use parentheses to indicate a function call. Use documented variable names in error messages. Use semicolons to end assert statements when they are within a BIST block. Add input validation tests.

4a3a7c6111c880258a2da90ffbb9eb53e421529f gnulib-hg