More clear comment for String.prototype.match() (#36301)

* More clear comment for String.prototype.match()

* Removed trailing spaces

src/lib/es2015.symbol.wellknown.d.ts

@@ -207,7 +207,8 @@ interface RegExpConstructor {
 
 interface String {
     /**
-     * Matches a string an object that supports being matched against, and returns an array containing the results of that search.
+     * Matches a string or an object that supports being matched against, and returns an array
+     * containing the results of that search, or null if no matches are found.
      * @param matcher An object that supports being matched against.
      */
     match(matcher: { [Symbol.match](string: string): RegExpMatchArray | null; }): RegExpMatchArray | null;
@@ -295,4 +296,4 @@ interface SetConstructor {
 }
 interface ArrayBufferConstructor {
     readonly [Symbol.species]: ArrayBufferConstructor;
-}
+}