Incorrect ValidateDocumentationComments warning for rethrows function

[rauhul]

Sources/ArgumentParser/Utilities/Mutex.swift:53:5: warning: [ValidateDocumentationComments] remove the 'Throws:' sections of 'withLock'; it does not throw any errors

  /// Calls the given closure after acquiring the lock and then releases
  /// ownership.
  ///
  /// - Warning: Recursive calls to `withLock` within the closure parameter has
  ///   behavior that is platform dependent. Some platforms may choose to panic
  ///   the process, deadlock, or leave this behavior unspecified. This will
  ///   never reacquire the lock however.
  ///
  /// - Parameter body: A closure with a parameter of `Value` that has exclusive
  ///   access to the value being stored within this mutex. This closure is
  ///   considered the critical section as it will only be executed once the
  ///   calling thread has acquired the lock.
  ///
  /// - Throws: Re-throws any error thrown by `body`.
  ///
  /// - Returns: The return value, if any, of the `body` closure parameter.
  func withLock<U>(
    _ body: (inout T) throws -> U
  ) rethrows -> U {
    self.lock.lock()
    defer { self.lock.unlock() }
    return try body(&self.value)
  }

[ahoppen]

Synced to Apple’s issue tracker as rdar://144562352