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@@ -11966,16 +11966,20 @@ interpreted language.
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The @code{:noweb} header argument controls expansion of ``noweb'' style (see
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@ref{Noweb reference syntax}) references in a code block. This header
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-argument can have one of two values: @code{yes} or @code{no}.
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+argument can have one of three values: @code{yes} @code{no} or @code{tangle}.
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@itemize @bullet
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+@item @code{yes}
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+All ``noweb'' syntax references in the body of the code block will be
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+expanded before the block is evaluated, tangled or exported.
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@item @code{no}
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The default. No ``noweb'' syntax specific action is taken on evaluating
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code blocks, However, noweb references will still be expanded during
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tangling.
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@item @code{yes}
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All ``noweb'' syntax references in the body of the code block will be
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-expanded before the block is evaluated.
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+expanded before the block is tangled, however ``noweb'' references will not
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+be expanded when the block is evaluated or exported.
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@end itemize
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@subsubheading Noweb prefix lines
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Eric Schulte