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  <p>
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  <p>
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  It returns the defined $emph value$emphend in the string, or the
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  It returns the defined $emph value$emphend in the string, or the
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  $emph name$emphend itself if it appears in $emph string$emphend but
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  $emph name$emphend itself if it appears in $emph string$emphend but
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  if there is no $emph =$emphend sign following it, or an empty string
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  if there is no $emph =$emphend sign following it, or an empty string
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  if $emph name$emphend does not appear in $emph string$emphend as a word.
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  if $emph name$emphend does not appear in $emph string$emphend as a word.
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  <p>
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  </p><p>
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  $emph value$emphend can be a multi-word string, if it is enclosed by a
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  $emph value$emphend can be a multi-word string, if it is enclosed by a
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  pair of parentheses, brackets, curly braces or double quotes. The enclosing
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  pair of parentheses, brackets, curly braces or double quotes. The enclosing
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  parentheses etc. will be removed from the output.
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  parentheses etc. will be removed from the output.
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  <p>
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  </p><p>
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  Spaces are allowed before and/or after the $emph =$emphend sign.
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  Spaces are allowed before and/or after the $emph =$emphend sign.
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  </p>
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