RFR: 8297941: Add override modifier in space.hpp [v2]

[Thomas Schatzl]

On Thu, 1 Dec 2022 14:33:49 GMT, Albert Mingkun Yang <ayang at openjdk.org> wrote:

>> Simple patch generated using `clang-tidy`.
>
> Albert Mingkun Yang has updated the pull request incrementally with one additional commit since the last revision:
> 
>   review

Marked as reviewed by tschatzl (Reviewer).

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PR: https://git.openjdk.org/jdk/pull/11451