!

src/0-intro.md

@@ -145,7 +145,7 @@ reference guide is the go-to stop for checking items about the Catala language
 and tooling as you're using it, whether you are a new or experienced user.
 
 The user guide starts with [Chapter 1](./1-0-getting_started.md) and the Catala
-equivalent of "*Hello, world*" program. [Chapter 2](./2-tutorial.md) explains
+equivalent of "*Hello, world!*" program. [Chapter 2](./2-tutorial.md) explains
 the core concepts of Catala with a hands-on tutorial centered on the automation
 of a basic, fictional tax system. Moving onto serious business, [Chapter
 3](./3-project.md) dives into the setting up of a real-world Catala project with