I'm about two weeks into learning Rust. One thing that has me a little confused is the status of the documentation vis-a-vis the version I have installed. What is the meaning of all the notes "This is a nightly-only experimental API." ?
For example, I go to https://doc.rust-lang.org/std/index.html and it shows a version number agreeing with that on my machine (1.47.0).
I look up String, click on ends_with, and get to a page which talks about Patterns, but when I click on Pattern, I get this page: https://doc.rust-lang.org/std/str/pattern/trait.Pattern.html which tells me "This is a nightly-only experimental API."
And I'm not sure then how that affects ends_with: which patterns can I use with ends_with in my 1.47.0 version?