Clarify optional attributes parameter to the various form element
constructors.
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@ -1018,7 +1018,14 @@ The procedures for the creation of the input fields mentioned in
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These create various input field where the user types something in.
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\var{default} is the text or the number that the browser initially
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displays in the input field. \var{attributes} are some further
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attributes for the input field in SXML notation.
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attributes for the input field in SXML notation---it needs to be a
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list of the following form:
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%
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\begin{alltt}
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(@ (\var{tag} \var{value})
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\ldots)
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\end{alltt}
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%
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\ex{make-text-field} creates a regular text input field. Its Scheme
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value is a string. \ex{make-number-field} creates a regular text
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input field, whose Scheme value is a number. It is an error if the
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