R-alpha: extraneous ";" gives syntax error

[Martin Maechler]

Here is what I mean

    > ;1
    ;1
    ^
    Error: syntax error
    > 1;;
    [1] 1
    1;;
      ^
    Error: syntax error
    > 1;;;3
    [1] 1
    1;;;3
      ^
    Error: syntax error

----

In S, these give no syntax errors; 
instead, NULL is returned (in some cases).

It's not a big issue,
but I don't see the advantage of  ``punishing empty statements''.

Martin
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