answer

.vscode/settings.json

@@ -0,0 +1,6 @@
+{
+    // ReasonMl
+    "reason.diagnostics.tools": ["merlin", "bsb"],
+    "editor.formatOnSave": true,
+    "reason.codelens.enabled": true
+}

src/exercises/01-introduction/introduction.re

@@ -1,37 +1,37 @@
-/*
-  Hello,
-
-  Reason is not a new language. It is syntactic sugar for the OCaml language
-  created in 1996. The new Reason syntax will look familiar to those who have
-  programmed in Javascript.
-
-  These challenges are originally from the workshop run by Jane Street to
-  teach OCaml. It was ported over to Reason with the help of `refmt` (Reason
-  format) binary that helps you convert to/from Reason/OCaml syntax.
-
-  This exercise is to familiarize you with the code-compile cycle.
-
-  To compile your code, run in a terminal session in the root directory
-
-    $ npm run build
-
-  You should see a compilation error because it's missing the end quote. Add
-  the end quote and re-run. You should see that the code compiled successfully!
-
-  For convenience you can build whenever you change the code by running the
-  compiler in watch mode. For that, run
-
-    $ npm run start
-
-  You can also execute code in Reason's REPL (rtop) directly. To start rtop from
-  your terminal run:
-
-    $ rtop
-
-  Now try pasting the code below into it.
-
-  *Note:* Use `Ctrl-d` to exit the rtop session.
-
-  Try these out and move on to the next exercise!
- */
-let () = print_endline("Hello, World!);
+/*
+  Hello,
+
+  Reason is not a new language. It is syntactic sugar for the OCaml language
+  created in 1996. The new Reason syntax will look familiar to those who have
+  programmed in Javascript.
+
+  These challenges are originally from the workshop run by Jane Street to
+  teach OCaml. It was ported over to Reason with the help of `refmt` (Reason
+  format) binary that helps you convert to/from Reason/OCaml syntax.
+
+  This exercise is to familiarize you with the code-compile cycle.
+
+  To compile your code, run in a terminal session in the root directory
+
+    $ npm run build
+
+  You should see a compilation error because it's missing the end quote. Add
+  the end quote and re-run. You should see that the code compiled successfully!
+
+  For convenience you can build whenever you change the code by running the
+  compiler in watch mode. For that, run
+
+    $ npm run start
+
+  You can also execute code in Reason's REPL (rtop) directly. To start rtop from
+  your terminal run:
+
+    $ rtop
+
+  Now try pasting the code below into it.
+
+  *Note:* Use `Ctrl-d` to exit the rtop session.
+
+  Try these out and move on to the next exercise!
+ */
+let () = print_endline("Hello, World!");