Function unescapeQuotes

packages/compiler/src/shadow_css.ts:1252–1254

* Unescape all quotes present in a string, but only if the string was actually already * quoted. * * This generates a "canonical" representation of strings which can be used to match strings * which would otherwise only differ because of differently escaped quotes. * * For example it converts

(str: string, isQuoted: boolean)

 * @returns the string in the "canonical" representation without escaped quotes.
 */
function unescapeQuotes(str: string, isQuoted: boolean): string {
  return !isQuoted ? str : str.replace(/((?:^|[^\\])(?:\\\\)*)\\(?=['"])/g, '$1');
}

/**
 * Combine the `contextSelectors` with the `hostMarker` and the `otherSelectors`