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table.deep_to_add: Don't emit empty subtables
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@ -489,7 +489,10 @@ function deep_to_add(table, after_additions)
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local additions = {}
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for key, value in pairs(after_additions) do
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if type(table[key]) == "table" and type(value) == "table" then
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additions[key] = deep_to_add(table[key], value)
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local sub_additions = deep_to_add(table[key], value)
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if next(sub_additions) ~= nil then
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additions[key] = sub_additions
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end
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elseif table[key] ~= value then
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additions[key] = value
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end
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