unstructured

c34fac9c - enhancement: add _clean_ocr_languages_arg helper function (#2413)

enhancement: add _clean_ocr_languages_arg helper function (#2413) This PR is one in a series of PRs for refactoring and fixing the languages parameter so it can address incorrect input by users. #2293 This PR adds _clean_ocr_languages_arg. There are no calls to this function yet, but it will be called in later PRs related to this series.