Capitalize the first character of the "optional parameter" error message
Capitalize the first character of the "optional parameter" error message

mbebenita/shumway.ts,mbrowne/typescript-dci,popravich/typescript,mbrowne/typescript-dci,hippich/typescript,popravich/typescript,mbrowne/typescript-dci,mbrowne/typescript-dci,hippich/typescript,mbebenita/shumway.ts,fdecampredon/jsx-typescript-old-version,fdecampredon/jsx-typescript-old-version,popravich/typescript,mbebenita/shumway.ts,hippich/typescript,fdecampredon/jsx-typescript-old-version