Merge pull request #285 from mattheww/2023-09_paths

Update Rust 2018 "Path and module system changes" for Rust 1.72

Author: ehuss

src/rust-2018/path-changes.md

@@ -206,6 +206,11 @@ mod submodule {
 }
 ```
 
+If you have a local module or item with the same name as an external crate, a
+path begining with that name will be taken to refer to the local module or
+item. To explicitly refer to the external crate, use the `::name` form.
+
+
 ### No more `mod.rs`
 
 In Rust 2015, if you have a submodule:
@@ -272,7 +277,7 @@ enough to have submodules.
 In Rust 2018, paths in `use` declarations and in other code work the same way,
 both in the top-level module and in any submodule. You can use a relative path
 from the current scope, a path starting from an external crate name, or a path
-starting with `crate`, `super`, or `self`.
+starting with `::`, `crate`, `super`, or `self`.
 
 Code that looked like this:
 
@@ -371,9 +376,3 @@ mod submodule {
 
 This makes it easy to move code around in a project, and avoids introducing
 additional complexity to multi-module projects.
-
-If a path is ambiguous, such as if you have an external crate and a local
-module or item with the same name, you'll get an error, and you'll need to
-either rename one of the conflicting names or explicitly disambiguate the path.
-To explicitly disambiguate a path, use `::name` for an external crate name, or
-`self::name` for a local module or item.