/usr/share/doc/ is in libhtml-mason-perl-doc 1:1.52-1.
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/usr/share/doc/libhtml-mason-perl-doc/
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/usr/share/doc/libhtml-mason-perl-doc/README.Debian
/usr/share/doc/libhtml-mason-perl-doc/copyright
/usr/share/doc/libhtml-mason-perl-doc/examples/
/usr/share/doc/libhtml-mason-perl-doc/examples/samples/
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/usr/share/doc/libhtml-mason-perl-doc/examples/eg/MyApp/
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/usr/share/doc/libhtml-mason-perl-doc/examples/eg/MyApp/Mason.pm