@item @option{-O format=@var{format}}
@pspp{} uses the extension of the file name given on @option{-o} to
select an output format. Use this option to override this choice by
-specifying an alternate format, e.g.@: @option{-o pspp.out -O html} to
+specifying an alternate format, e.g.@: @option{-o pspp.out -O format=html} to
write HTML to a file named @file{pspp.out}. Use @option{--help} to
list the available formats.