[mdspan.layout.leftpad.obs, mdspan.layout.rightpad.obs] Fix return type of operator()

[hewillk]

This is consistent with the declaration.

[jwakely]

I agree that this is editorial.

[jensmaurer]

This fixes an incomplete application of P2599R2 index_type & size_type in mdspan
applied in commit 7fbd063

@hewillk , could you please update the commit description accordingly and force-push? Thanks.

[hewillk]

This fixes an incomplete application of P2599R2 index_type & size_type in mdspan applied in commit 7fbd063

@hewillk , could you please update the commit description accordingly and force-push? Thanks.

Sorry, why is this related to P2599R2?
It seems to me that this is most likely a typo, because the function has been declared as constexpr index_type operator()(Indices...) const noexcept in [mdspan.layout.leftpad.overview].

[jensmaurer]

Ah, right, this is a bug in P2642R6, where the inconsistent declarations were added originally.

[jensmaurer]

... but please remove "'m not sure if this is LWG; I doubt it." from the commit description and force-push; this is good discussion for the pull request, but has little value in the commit history.

[hewillk]

... but please remove "'m not sure if this is LWG; I doubt it." from the commit description and force-push; this is good discussion for the pull request, but has little value in the commit history.

Done. Is this okay?