This file is indexed.

/usr/share/compizconfig/upgrades/com.canonical.unity.unity.01.upgrade is in compiz-gnome 1:0.9.13.0+16.10.20160818.2-5.1.

This file is owned by root:root, with mode 0o644.

The actual contents of the file can be viewed below.

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[core]
-s0_active_plugins = staticswitcher

[unityshell]
+s0_alt_tab_timeout = true