docs: http api doc edit (#31613)

PR Close #31613

packages/common/http/src/xhr.ts

@@ -38,8 +38,7 @@ function getResponseUrl(xhr: any): string|null {
 export abstract class XhrFactory { abstract build(): XMLHttpRequest; }
 
 /**
- * A factory for @{link HttpXhrBackend} that uses the `XMLHttpRequest` browser API.
- *
+ * A factory for `HttpXhrBackend` that uses the `XMLHttpRequest` browser API.
  *
  */
 @Injectable()
@@ -59,8 +58,9 @@ interface PartialResponse {
 }
 
 /**
- * An `HttpBackend` which uses the XMLHttpRequest API to send
- * requests to a backend server.
+ * Uses `XMLHttpRequest` to send requests to a backend server.
+ * @see `HttpHandler`
+ * @see `JsonpClientBackend`
  *
  * @publicApi
  */
@@ -69,7 +69,9 @@ export class HttpXhrBackend implements HttpBackend {
   constructor(private xhrFactory: XhrFactory) {}
 
   /**
-   * Process a request and return a stream of response events.
+   * Processes a request and returns a stream of response events.
+   * @param req The request object.
+   * @returns An observable of the response events.
    */
   handle(req: HttpRequest<any>): Observable<HttpEvent<any>> {
     // Quick check to give a better error message when a user attempts to use