In the documentation I found the following sentence.
Has anybody any working examples?
I tried some the following. But no substitution occurs.
In global.sublime-settings (in my user folder
// Place user-specific overrides in this file, to ensure they're preserved
// when upgrading
'sigAuthor': 'Joe Example <firstname.lastname@example.org>'
In a .snippet
# Copyright (c) $YEAR $sigAuthor
<!-- Optional: Set a tabTrigger to define how to trigger the snippet -->
<!-- Optional: Set a scope to limit where the snippet will trigger -->
<!-- <scope>source.python</scope> -->