Fixed phrasing per @parlough

src/content/tools/pub/dependencies.md

@@ -443,6 +443,29 @@ To identify dependencies in your app or package that
 aren't on the latest stable versions,
 use [`dart pub outdated`][].
 
+### Tighten version constraints for dev dependencies
+
+A dev dependency defines a package that you need only when developing.
+A finished app won't need these packages.
+Examples of these packages include tests or code generation tooling.
+Set the version constraints of packages in [`dev_dependencies`][dev-dep]
+to have a lower bound of the latest version on which your package depends.
+
+Tightening the version constraints of your dev dependencies might
+resemble the following:
+
+```yaml
+dev_dependencies:
+  build_runner: ^2.4.8
+  lints: ^2.1.1
+  test: ^1.25.1
+```
+
+This YAML sets the `dependencies` to the major version and the
+`dev_dependencies` to a specific patch version.
+
+[dev-dep]: /tools/pub/dependencies#dev-dependencies
+
 ### Test whenever you update package dependencies
 
 If you run [`dart pub upgrade`][] without updating your pubspec,