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doc/Factoids.md: document pick_unique(x)

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Pragmatic Software 2020-06-01 18:30:50 -07:00
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@ -398,6 +398,7 @@ Modifier | Description
`:index(n)` | Selects the `n`th element from the `$variable` list.
`:pick(x)` | Selects `x` count of random elements.
`:pick(x,y)` | Selects between `x` and `y`, inclusive, count of random elements. `x` may be `0` to occasionally pick no value. In this case the `$variable` and any leading whitespace will be stripped.
`:pick_unique(x)` | Selects `x` count of random elements without any repeated selections.
`:pick_unique(x,y)` | Selects between `x` and `y`, inclusive, count of random elements without any repeated selections. `x` may be `0` to occasionally pick no value. In this case the `$variable` and any leading whitespace will be stripped.
Text modifiers alter the selected values.