message: Add a missing preposition in the Spanish locale (closes
diff: import buildFormatLongFn from '../../../_lib/buildFormatLongFn/index.js'
  var dateFormats = {
  - full: "EEEE, d 'de' MMMM y",
  - long: "d 'de' MMMM y",
  + full: "EEEE, d 'de' MMMM 'de' y",
  + long: "d 'de' MMMM 'de' y",
  medium: 'd MMM y',
  short: 'dd/MM/y'
  }
  