message: Fix typo in documenation.
diff: @@ -141,7 +141,8 @@ class PrivateKeyManagerImpl<
  // Using this, all template arguments except the first one can be infered.
  // Example:
  // std::unique_ptr<KeyManager<PublicKeySign>> km =
  -// MakeKeyManager<PublicKeySign>(internal_private_km, internal_public_km);
  +// MakePrivateKeyManager<PublicKeySign>(internal_private_km,
  +// internal_public_km);
  template <class Primitive, class PrivateKeyProto, class KeyFormatProto,
  class PublicKeyProto, class PrivatePrimitivesList,
  class PublicPrimitivesList>
  