Jeff

[BUG] Modify `concatenate_columns` ignore_empty output

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# PR Description Please describe the changes proposed in the pull request: - modify concatenate_column ignore_empty output (pd.NA,pd.NaT,None,np.nan => "") - modify concatenate_columns test case **This PR resolves #1164.** #...

[BUG] `concatenate_columns` Ignoring null values is not available

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## Source Code ```Python @pf.register_dataframe_method @deprecated_alias(columns="column_names") def concatenate_columns( df: pd.DataFrame, column_names: List[Hashable], new_column_name: Hashable, sep: str = "-", ignore_empty: bool = True, ) -> pd.DataFrame: if len(column_names) < 2: raise...