[expr] right shift operator; only applies to integer arguments.

Equivalent to dividing the first argument by 2 ''n'' times (i.e., `[/](2[**]$n)`), where ''n'' is the second argument.

    :   ''[[[DKF]: Is this an arithmetic or logical shift? I think it might be an arithmetic one, as it is well-defined on negative numbers with [bignum]s]]''

[AMG]: Definitely arithmetic.  [[[expr] {-1 >> 1}]] gives -1, not 2147483647 or any such thing.

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