The amend page of the dictionary
http://www.jsoftware.com/books/help/dictionary/d530n.htm
currently reads:
If m is not a gerund, x m} y is formed by replacing
by x those parts of y selected by m&{ .
In the next J6.01 beta, it has been changed to read:
If m is not a gerund, x m} y is formed by replacing
by x those parts of y selected by m&{ (an error is
signalled if such selection requires fill).
The implementation will be updated likewise.
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