melt_votes: Melt wide-formatted returns
In MEDSL/medslcleaner: A MEDSL Package for Cleaning Election Returns

A wrapper for data.table::melt() in the common case where candidates are in columns and cells give votes.

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melt_votes(.data, ..., na.rm = TRUE, value.name = "votes",
  variable.name = "candidate", variable.factor = FALSE,
  value.factor = FALSE)

`.data`	A table of returns.
`...`	any other arguments to be passed to/from other methods.
`na.rm`	If `TRUE`, `NA` values will be removed from the molten data.
`value.name`	name for the molten data values column(s). The default name is `'value'`. Multiple names can be provided here for the case when `measure.vars` is a `list`, though note well that the names provided in `measure.vars` take precedence.
`variable.name`	name for the measured variable names column. The default name is `'variable'`.
`variable.factor`	If `TRUE`, the `variable` column will be converted to `factor`, else it will be a `character` column.
`value.factor`	If `TRUE`, the `value` column will be converted to `factor`, else the molten value type is left unchanged.