Changed "functional structure update syntax" to "structure update syntax"

[alexispurslane]

per #28168. This is my first contribution. I don't know who to "r?" for source code changes.

[rust-highfive]

Thanks for the pull request, and welcome! The Rust team is excited to review your changes, and you should hear from @nrc (or someone else) soon.

If any changes to this PR are deemed necessary, please add them as extra commits. This ensures that the reviewer can see what has changed since they last reviewed the code. The way Github handles out-of-date commits, this should also make it reasonably obvious what issues have or haven't been addressed. Large or tricky changes may require several passes of review and changes.

Please see the contribution instructions for more information.

[nrc]

@bors: r+ rollup

[bors]

📌 Commit f56a410 has been approved by nrc

[nrc]

@ChristopherDumas If you don't know who to r?, don't do anything and highfive will pick a suitable reviewer for you

[alexispurslane]

Thanks! I noticed from "nrc was assigned by rust-highfive 3 minutes ago" message.

[alexispurslane]

I'm really excited to start contributing to rust.

[steveklabnik]

🎊

[bluss]

@bors r=nrc

@ChristopherDumas Don't forget to ping someone if you push an update to your PR. It should be on its way to merge now.

[bors]

📌 Commit cd9c9f0 has been approved by nrc

[bors]

⌛ Testing commit cd9c9f0 with merge 86156ac...

[bors]

☀️ Test successful - auto-linux-32-nopt-t, auto-linux-32-opt, auto-linux-64-nopt-t, auto-linux-64-opt, auto-linux-64-x-android-t, auto-mac-32-opt, auto-mac-64-nopt-t, auto-mac-64-opt, auto-win-gnu-32-nopt-t, auto-win-gnu-32-opt, auto-win-gnu-64-nopt-t, auto-win-gnu-64-opt, auto-win-msvc-32-opt, auto-win-msvc-64-opt