keyboard: replace duplicate period key #36361
                
     Merged
            
            
          
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Quick fix for the duplicate period key not working. We'll just replace the first one with either underscore/hypen, depending on which one isn't already present. I think underscore would be more useful for things like Github username anyway, so it's nice to have it without going all the way into symbols.
If anyone has a new symbol suggestion, let me know. We could also adjust the layout or make the space bar wider instead.