[Pkg-gmagick-im-team] Bug#939827: say "doc" package

[積丹尼 Dan Jacobson]

Package: imagemagick-6.q16
Version: 8:6.9.10.23+dfsg-2.1+b1
Severity: minor
File: /usr/share/man/man1/montage-im6.q16.1.gz


< For more information about the montage command, point your browser to
       file:///usr/share/doc/imagemagick-6-common/html/www/montage.html
       (on debian system you may install the imagemagick-6 package) or
       https://www.image‐ magick.org/script/montage.php.

Say instead the "imagemagick-6-doc" package!