Add an explicit note about free interpolation following numbers (#3168)

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Christophe Coevoet 2021-10-06 18:44:11 +02:00 committed by GitHub
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@ -17,3 +17,7 @@ identifier. This means that:
that hyphen is considered part of the identifier. This means that `$var -#{b}`
is parsed as a space-separated list containing `$var` and `-#{b}` rather than
as the operation `$var - #{b}`.
* Because numbers are not an identifier start characters and the interpolation
is parsed as an alphabetic character, `0#{$b}` is parsed as a space-separated
list containing `0` and `#{$b}`