Internal citation layer entries do not get compacted

[cmc333333]

The Internal citation layer doesn't merge multiple instances of the same citation into a single entry with multiple positions.

For example:

"1005-Interpretations-20-(b)(4)-2-i": [
        {
            "citation": [
                "1005", 
                "20", 
                "b", 
                "4"
            ], 
            "offsets": [
                [
                    210, 
                    223
                ]
            ]
        }, 
        {
            "citation": [
                "1005", 
                "20", 
                "b", 
                "4"
            ], 
            "offsets": [
                [
                    450, 
                    463
                ]
            ]
        },