suffix "opt" are missing in one line grammar (ex. 13.7.4.5)

[kotarondo]

Summary

For example, in 13.7.4.5
current draft and ES7 displays one line grammar as

IterationStatement : for ( LexicalDeclaration Expression ; Expression ) Statement
    Return the VarDeclaredNames of Statement.

If it is read literally, it does not define anything on the following grammar.

IterationStatement : for ( LexicalDeclaration ; ) Statement
IterationStatement : for ( LexicalDeclaration Expression ; ) Statement
IterationStatement : for ( LexicalDeclaration ; Expression ) Statement

This is not what we intend.

On the other hand, ES6 displays:

IterationStatement : for ( LexicalDeclaration Expression opt ; Expression opt ) Statement
    Return the VarDeclaredNames of Statement.

This is more comprehensive because "opt" is expanded as shown in "5.1.5 Grammar Notation".

NOTE1: How are "opt" suffixes dropped ?

Actually, in the raw html document, these Expressions are given opt suffix,
but they are not displayed because of "ecmarkup.css" line 249:

emu-production[collapsed] emu-mods {
  display: none;
}

Here "collapsed" attributes on "emu-production" are given in the build process.
Precisely, they are given in grammarkdown/out/lib/emitter/ecmarkup.js line 36:

    else if (node.body.kind === tokens_1.SyntaxKind.RightHandSide) {
        this.writer.write(" collapsed");
    }

where grammarkdown is a npm module called from ecmarkup build tool.

By the way, opt suffixes are DISPLAYED in multiline grammars (ex. 13.7.4.4)
because node.body.kind === tokens_1.SyntaxKind.RightHandSideList.

Anyway, I think the specification contents must be self-contained except for its displaying formats (fonts, etc). Outside format tools must not change the specification contents.

Note2

You can not say "opt suffix is automatically inserted when the corresponding Syntax has it."
because expanded grammars may be referred separately.

For example, In 13.3.2.4

VariableDeclaration : BindingIdentifier
    Return NormalCompletion(empty).

VariableDeclaration : BindingIdentifier Initializer
    Let bindingId be StringValue of BindingIdentifier.
    Let lhs be ? ResolveBinding(bindingId).
    ...

Here we can not insert opt suffix after Initializer
although the corresponding Syntax has it.

[kotarondo]

Another example for Note2

In 13.3.3.2 Static Semantics: ContainsExpression

BindingElement: BindingPattern Initializer
    Return true.

Here you can insert 'opt' suffix after 'Initializer' without any formal contradiction on the spec, but it produces an unexpected specification.

[kotarondo]

Another example for Note2

In 13.3.3.2 Static Semantics: ContainsExpression

BindingElement: BindingPattern Initializer
    Return true.

Here you can insert 'opt' suffix after 'Initializer' without any formal contradiction on the spec, but it produces an unexpected specification.