This is the correct spelling of "Supercalifragilisticexpialidocious".

The statement "this-is-the-correct-spelling-of-supercalifragilisticexpialidocious" is true because it accurately represents the correct spelling of the word "supercalifragilisticexpialidocious." This word, famously used in the Disney movie "Mary Poppins," is a fictional term that means extraordinarily good or wonderful. Its spelling consists of a long string of letters, forming a unique and iconic word, which has become synonymous with something imaginative and impressive.