Fix index entry for HTMLParser class.

Doc/lib/libformatter.tex

@@ -7,7 +7,7 @@ This module supports two interface definitions, each with mulitple
 implementations.  The \emph{formatter} interface is used by the
 \class{HTMLParser} class of the \module{htmllib} module, and the
 \emph{writer} interface is required by the formatter interface.
-\withsubitem{(im module htmllib)}{\ttindex{HTMLParser}}
+\withsubitem{(class in htmllib)}{\ttindex{HTMLParser}}
 
 Formatter objects transform an abstract flow of formatting events into
 specific output events on writer objects.  Formatters manage several

Doc/libformatter.tex

@@ -7,7 +7,7 @@ This module supports two interface definitions, each with mulitple
 implementations.  The \emph{formatter} interface is used by the
 \class{HTMLParser} class of the \module{htmllib} module, and the
 \emph{writer} interface is required by the formatter interface.
-\withsubitem{(im module htmllib)}{\ttindex{HTMLParser}}
+\withsubitem{(class in htmllib)}{\ttindex{HTMLParser}}
 
 Formatter objects transform an abstract flow of formatting events into
 specific output events on writer objects.  Formatters manage several