Helper function: tidy dataframe

tidy_df(df, exclude_cols = "rec_number")

Arguments

df	data frame as retrieved by create_references_df() or clean_references_df()
exclude_cols	vector of column names to exclude for gathering (default: "rec_number")

a tidy dataframe with columns rec_number, key and value

if (FALSE) {
endnote_list <- create_endnote_list()
refs_df <- create_references_df(endnote_list)
refs_df_tidy <- tidy_df(refs_df)
}