patch applied (packages/HaXml): Add a -n cmd-line option to Xtract.

[Malcolm Wallace]

Wed May 30 05:44:08 PDT 2007  Malcolm.Wallace at cs.york.ac.uk
  * Add a -n cmd-line option to Xtract.
  With -n, the output converts entities like < to their textual
  equivalents e.g. <.  This applies to _all_ nested textual content within
  elements (and in attributes too), making the output not strictly
  XML-conformant, but more human-readable.
  
  As a consequence of the way this is implemented, it also fixes an output
  problem that used to occur with adjacent text and entities, where they
  would appear on separate lines, e.g.
     don
     &apos;
     t
  Now, all text is 'unescape'd internally during the query, and only
  'escape'd again at the output stage (if -n is _not_ present).  The
  net result is that the previous example now looks more correct:
     don&apos;t

    M ./src/Text/XML/HaXml/Xtract/Parse.hs -2 +10
    M ./src/tools/Xtract.hs -6 +13