It defines how the batch builds are done. Does this matter to you for some reason, or are you just pointing out a possible mistake?
Any inconsistency between the source tree and camera_list.csv causes the CHIMP camera metadata generator tool to fail.
Edit: I just noticed that the Wifi button is called "WiFi" in g7x2 (as well as in sx700hs, sx60hs, g5x), whereas it's "Wifi" in g7x (and in six others). In addition, s95 has a "Play" button (should be "Playback").
Edit 2: There are also "VIDEO" and "Disp"... starting to look like a lost battle.