improve printout of duplicate hashes to make it more readable

    return hashline

def get_duplicates(hashlines: list) -> dict:

    count = Counter([line.split()[-1] for line in hashlines])

    duplicates = {}

    for hash, count in count.items():

        if count == 1:

            continue

        files = [line.replace(hash, "").strip() for line in hashlines if hash in line]

        duplicates[hash] = files

    return duplicates

def main(output_dir, out_file):

    wav_files = sorted(output_dir.glob("*/**/*c[0-9][0-9].wav"))

    hashlines = [get_hash_line_for_file(f, output_dir) for f in wav_files]

    count = Counter([line.split()[-1] for line in hashlines])

    duplicates = [line for line in hashlines if count[line.split()[-1]] != 1]

    duplicates = get_duplicates(hashlines)

    if len(duplicates) != 0:

        print("Found duplicate hashes in these lines:")

        for dup in duplicates:

            print(dup)

        print(

            "Found duplicate hashes! The following hashes were found in multipe files:"

        )

        for hash, files in duplicates.items():

            print(f"{hash} - {', '.join(files)}")

    with open(out_file, "w") as f:

        f.writelines(hashlines)