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Solve the following problem using Python, implementing the functions described below, one line at a time
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Description:
 def dots_to_empty_cells(config, tsv_fpath):
 """Put dots instead of empty cells in order to view TSV with column -t """

    def proc_line(l, i):
        while '\t\t' in l:
            l = l.replace('\t\t', '\t.\t')
        return l
    return iterate_file(config, tsv_fpath, proc_line, suffix='dots')