/usr/share/gnome-terminal/terminal.about is in gnome-terminal-data 3.6.2-0ubuntu1.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
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Authors=Behdad Esfahbod <behdad%gnome.org>;Guilherme de S. Pastore <gpastore%gnome.org>;Havoc Pennington <hp%redhat.com>;Christian Persch <chpe%gnome.org>;Mariano Suárez-Alvarez <mariano%gnome.org>;
Contributors=
;Artists=
Documenters=GNOME Documentation Team <gnome-doc-list%gnome.org>;
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