remove duplicated values in labels; fixed issue #79 #80
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fix #79
This arose as an issue due to change in haven 2.1.0 from this commit: tidyverse/haven@ac15324b
The issue I found was that in some cases the same value was duplicated in the value labels parsed from the DCF file. For example in the "MVIR71FL.ZIP" dataset, for variable
v128
the code96
was repeated twice: