Fix ** right-associativity, and clarify docs
#1566
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Rangi42
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The
**exponentiation operator was supposed to be right-associative (like in Python, Ruby, Perl, Fortran, and most other languages), but it wasn't. This has been fixed from #675.The operator precedence table was also somewhat confusing, with different precedence levels for some operators evidently just for the sake of fitting descriptions for each of them into individual cells. This has also been cleaned up: