∀ {𝕜 : Type u_1} {E : Type u_2} [inst : RCLike 𝕜] [inst_1 : NormedAddCommGroup E] [inst_2 : InnerProductSpace 𝕜 E]
  [inst_3 : CompleteSpace E] (x : E),
  ContinuousLinearMap.adjoint ((innerSL 𝕜) x) = ContinuousLinearMap.toSpanSingleton 𝕜 x