Change {} into filename. Replace empty spaces with underscores. Replace diacritic letters with their non-diacritic equivalents. Replace colons with hyphens. Preserve all capitalization. Replace Symbols such as `&` with hyphens. Delete any apostrophes, quotation marks, question marks, exclamation marks, colons, dashes, commas, or periods. Prefix the filename with `illustration-` Return only the fixed filename.