message: Fix build of the PDF manual
diff: @@ -121,12 +121,12 @@ for CLI parsing and allows users to abbreviate commonly used option names. The
  third and final argument to \lstinline^add^ is a help text.
  The custom \lstinline^config^ class allows end users to set the port for the
  -application to 42 with either \lstinline^--port=42^ (long name) or \lstinline^-p
  -42^ (short name). The long option name is prefixed by the category when using a
  -different category than ``global''. For example, adding the port option to the
  -category \lstinline^foo^ means end users have to type \lstinline^--foo.port=42^
  -when using the long name. Short names are unaffected by the category, but have
  -to be unique.
  +application to 42 with either \lstinline^-p 42^ (short name) or
  +\lstinline^--port=42^ (long name). The long option name is prefixed by the
  +category when using a different category than ``global''. For example, adding
  +the port option to the category \lstinline^foo^ means end users have to type
  +\lstinline^--foo.port=42^ when using the long name. Short names are unaffected
  +by the category, but have to be unique.
  Boolean options do not require arguments. The member variable
  \lstinline^server_mode^ is set to \lstinline^true^ if the command line contains
  