docs: fix verbiage, remove potential confusion, in hello world section (#23310)

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@ -262,7 +262,7 @@ As in many other languages (such as C, Go, and Rust), `main` is the entry point
[`println`](#println) is one of the few [built-in functions](#builtin-functions). [`println`](#println) is one of the few [built-in functions](#builtin-functions).
It prints the value passed to it to standard output. It prints the value passed to it to standard output.
`fn main()` declaration can be skipped in one file programs. `fn main()` declaration can be skipped in single file programs.
This is useful when writing small programs, "scripts", or just learning the language. This is useful when writing small programs, "scripts", or just learning the language.
For brevity, `fn main()` will be skipped in this tutorial. For brevity, `fn main()` will be skipped in this tutorial.