message: [clippy] fix context clippy
diff: @@ -125,6 +125,7 @@ where
  self.parts.curr_handle()
  }
  + #[allow(clippy::needless_doctest_main)]
  /// Sets the mailbox capacity.
  ///
  /// The default mailbox capacity is 16 messages.
  @@ -155,6 +156,15 @@ where
  }
  }
  +impl<A> Default for Context<A>
  +where
  + A: Actor<Context = Self>,
  +{
  + fn default() -> Self {
  + Self::new()
  + }
  +}
  +
  impl<A> AsyncContextParts<A> for Context<A>
  where
  A: Actor<Context = Self>,
  