fixed one more typo

Doc/lib/libpprint.tex

@@ -156,7 +156,7 @@ l/lib/python1.5/test', '/usr/local/lib/python1.5/sunos5', '/usr/local/lib/python
 
 \begin{methoddesc}{pformat}{object}
 Return the formatted representation of \var{object}.  This takes into
-Account the options passed to the \class{PrettyPrinter} constructor.
+account the options passed to the \class{PrettyPrinter} constructor.
 \end{methoddesc}
 
 \begin{methoddesc}{pprint}{object}