41e8af7 cleanup: Require "dangling" commas

Authored and Committed by Florian Müllner 4 years ago
    cleanup: Require "dangling" commas
    
    Since ES5, trailing commas in arrays and object literals are valid.
    We generally haven't used them so far, but they are actually a good
    idea, as they make additions and removals in diffs much cleaner.
    
    https://pagure.io/background-logo-extension/pull-request/19
    
        
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