Documentation: Unclear difference between "string slices" and "string literals" for newcomers

[defuz]

From "Strings" chapter:

Rust has two main types of strings: &str and String. Let’s talk about &str first. These are called ‘string slices’. String literals are of the type &'static str...

The problem is that a beginner who reads these lines can make a false conclusion that "string slice" and "string literal" mean the same thing, and string slices always has a static lifetime.

Comment from newcomer:

In fact, there is mention of the fact that the slices may has different lifetimes in the book. But from the point of view of a beginner there is no difference between "string slice" and "string literal", because these terms are used in the book as if they are synonymous. When I read these lines I always thought that these terms mean the same thing.

[Gankra]

To be clear: a string literal is just a string slice that lives forever (because it's a pointer into the binary's rodata or whatever).

[defuz]

@gandro, yep, but looks like it is not obvious for newcomers. I think we should make these lines in the book more clear.

[Gankra]

Yep, always a great thing to do! Just clarifying for whoever wants to fix this up.