Fix #2255: document the `implicit` property of `OperatorNode`
Fix #2255: document the `implicit` property of `OperatorNode`

FSMaxB/mathjs,josdejong/mathjs,FSMaxB/mathjs,FSMaxB/mathjs,josdejong/mathjs,josdejong/mathjs,FSMaxB/mathjs,josdejong/mathjs,FSMaxB/mathjs,josdejong/mathjs