Add spellcheck -> spellCheck mapping to documentation to account for a…

…lphagov/govuk-frontend#1859

README.md

@@ -61,6 +61,7 @@ Exceptions to the conformance with govuk-frontend nunjucks params are as follows
 - Header links - `homepageUrl` and `serviceUrl` become `homepageUrlHref` / `homepageUrlTo` and `serviceUrlHref` / `serviceUrlTo`, with the `To` variants being passed to a react-router `<Link>` the `Href` variants being a plain html `<a>` tag
 - Anywhere that accepts an `html` or `text` param in Nunjucks will instead accept a `children` prop which should be passed either a string, or JSX. Params such as `summaryText` or `summaryHtml` become `summaryChildren`
 - `classes` becomes `className`
+- `spellcheck` becomes `spellCheck`
 - `describedBy` becomes `aria-describedby`
 - List keys - Anywhere that you specify an array of items such as a list of links, you may optionally specify a `reactListKey` for each item. This will be used instead of the index when doing `.map` over the items. React uses these keys internally to work out whether to re-render items. This is crucial for dynamic components where you might re-sort the list items for example. For static data it is less important and the key can be omitted. (See https://reactjs.org/docs/lists-and-keys.html#keys for more)
   (_The only exception to this rule is the tab component, where the tabs are already sufficiently keyed by id_)

utils/processExampleData.js

@@ -22,6 +22,7 @@ const propReplacements = {
   inputmode: 'inputMode',
   serviceUrl: 'serviceUrlHref',
   homepageUrl: 'homepageUrlHref',
+  spellcheck: 'spellCheck',
 };
 
 export default function processExampleData(data, componentName) {