Minor tweak as a side effect of fixing #1243553. The Unicode name for " is

'quotation mark', so I decided to use it instead of 'double-quote'.

Doc/lib/libcgi.tex

@@ -404,7 +404,7 @@ Convert the characters
 \character{\&}, \character{<} and \character{>} in string \var{s} to
 HTML-safe sequences.  Use this if you need to display text that might
 contain such characters in HTML.  If the optional flag \var{quote} is
-true, the double-quote character (\character{"}) is also translated;
+true, the quotation mark character (\character{"}) is also translated;
 this helps for inclusion in an HTML attribute value, as in \code{<A
 HREF="...">}.  If the value to be quoted might include single- or
 double-quote characters, or both, consider using the