* Add note about using Body parameters without Pydantic. PR [#900](https://github.com/tiangolo/fastapi/pull/900) by [@pawamoy](https://github.com/pawamoy).
* Fix Pydantic field clone logic. PR [#899](https://github.com/tiangolo/fastapi/pull/899) by [@deuce2367](https://github.com/deuce2367).

like being that person, I'll come up:  if not, I'll stay down
here till I'm somebody else"--but, oh dear!' cried Alice, with a
sudden burst of tears, `I do wish they WOULD put their heads
down!  I am so VERY tired of being all alone here!'

  As she said this she looked down at her hands, and was
surprised to see that she had put on one of the Rabbit's little
white kid gloves while she was talking.  `How CAN I have done

 *  Fix: Don't crash with a `InaccessibleObjectException` when detecting the platform trust manager
    on Java 17+.
 *  Fix: Don't crash if a cookie's value is a lone double quote character.
 *  Fix: Don't crash when canceling an event source created by `EventSources.processResponse()`.
 *  New: `Cache` now has a public constructor that takes an [okio.FileSystem]. This should make it

   * to {@code statusFuture} <i>in addition to</i> the call you make to {@link #finishToFuture()} or
   * a derivation method <i>on the same instance</i>. This is important because calling {@code
   * statusFuture} alone does not provide a way to close the pipeline.
   */
  public ListenableFuture<?> statusFuture() {
    return nonCancellationPropagating(future.transform(constant(null), directExecutor()));
  }

  /**

    Object valueThree = new Object();
    int hashThree = map.hash(keyThree);
    DummyEntry<Object, Object> entryThree =
        createDummyEntry(keyThree, hashThree, valueThree, entryTwo);

    // alone
    assertThat(segment.removeEntryFromChain(entryOne, entryOne)).isNull();

    // head
    assertThat(segment.removeEntryFromChain(entryTwo, entryTwo)).isSameInstanceAs(entryOne);

    // middle

    Object valueThree = new Object();
    int hashThree = map.hash(keyThree);
    DummyEntry<Object, Object> entryThree =
        createDummyEntry(keyThree, hashThree, valueThree, entryTwo);

    // alone
    assertThat(segment.removeEntryFromChain(entryOne, entryOne)).isNull();

    // head
    assertThat(segment.removeEntryFromChain(entryTwo, entryTwo)).isSameInstanceAs(entryOne);

    // middle

pkg html/template, method (*Error) Error() string
pkg html/template, method (*Template) AddParseTree(string, *parse.Tree) (*Template, error)
pkg html/template, method (*Template) Clone() (*Template, error)
pkg html/template, method (*Template) Delims(string, string) *Template
pkg html/template, method (*Template) Execute(io.Writer, interface{}) error

    code][https_server_sample].

 *  **OkHttp now supports prior knowledge cleartext HTTP/2.** Enable this by setting
    `Protocol.H2_PRIOR_KNOWLEDGE` as the lone protocol on an `OkHttpClient.Builder`. This mode
    only supports `http:` URLs and is best suited in closed environments where HTTPS is
    inappropriate.

    * Authenticated users are decorated with a 'system:authenticated' group.
    * NOTE: anonymous access is enabled by default. If you rely on authentication alone to authorize access, change to use an authorization mode other than AlwaysAllow, or or set '--anonymous-auth=false'.

        app = FastAPI()

        @app.head("/items/", status_code=204)
        def get_items_headers(response: Response):
            response.headers["X-Cat-Dog"] = "Alone in the world"
        ```
        """
        return self.router.head(
            path,
            response_model=response_model,
            status_code=status_code,
            tags=tags,