Fix odd usage of transform-styles wrap function. (#23599)

packages/block-editor/src/utils/transform-styles/transforms/test/wrap.js

@@ -22,7 +22,7 @@ describe( 'CSS selector wrap', () => {
  } );
 
  it( 'should ignore selectors', () => {
- const callback = wrap( '.my-namespace', 'body' );
+ const callback = wrap( '.my-namespace', [ 'body' ] );
  const input = `h1, body { color: red; }`;
  const output = traverse( input, callback );
 

packages/block-editor/src/utils/transform-styles/transforms/wrap.js

@@ -3,7 +3,23 @@
  */
 const IS_ROOT_TAG = /^(body|html|:root).*$/;
 
+/**
+ * Creates a callback to modify selectors so they only apply within a certain
+ * namespace.
+ *
+ * @param {string} namespace Namespace to prefix selectors with.
+ * @param {string[]} ignore Selectors to not prefix.
+ *
+ * @return {(node: Object) => Object} Callback to wrap selectors.
+ */
 const wrap = ( namespace, ignore = [] ) => ( node ) => {
+ /**
+ * Updates selector if necessary.
+ *
+ * @param {string} selector Selector to modify.
+ *
+ * @return {string} Updated selector.
+ */
  const updateSelector = ( selector ) => {
  if ( ignore.includes( selector.trim() ) ) {
  return selector;