Fix compile error on clang and documentation

[sdebionne]

Description

Fixes #775

Ports #767 from develop to master ~mloskot

References

Permission granted to merge this fixup on master for 1.90:

https://lists.boost.org/archives/list/boost@lists.boost.org/message/RVU7AKXUXA6X6K3MG4ZEQZ5WIWVW7I5E/

[sdebionne]

@mloskot Do you know the way to handle "late" commit to master when we can't / don't want to merge everything from develop?

[mloskot]

@sdebionne

Do you know the way to handle "late" commit to master when we can't / don't want to merge everything from develop?

I don't know any general Boost policy, but I know some maintainers decided to cherry-pick commits.

I recall this old discussion on the merge policy in #663 where we seem to decided we prefer true merges, but we also don't object cherry-picking.

[sdebionne]

Thanks! I did cherry-pick first before creating this PR, hoping to bypass this issue:

To github.com:boostorg/gil.git
 ! [remote rejected]     master -> master (protected branch hook declined)

But no luck. How can I temporarily disable the protection on master? I does not look I have the permission for that (unavailable in the repo settings).

[mloskot]

@sdebionne

How can I temporarily disable the protection on master? I does not look I have the permission for that

Please, try again. You should be able to see it now :)

[sdebionne]

I am adding the doc fixup as well since we don't need permission for that. The CI is stuck, but I suppose this PR lacks the necessary fixes.

I am planning to fix the CI and merge develop for the next release.

[mloskot]

Thank you