Correct start-server-and-test code blocks (#6065)

Author: MikeMcC399

Diff for: docs/app/continuous-integration/overview.mdx

@@ -105,13 +105,25 @@ module.
 
 <Tabs>
   <TabItem value="npm">
-    ```shell npm install start-server-and-test --save-dev ```
+
+    ```shell
+    npm install start-server-and-test --save-dev
+    ```
+
   </TabItem>
   <TabItem value="yarn">
-    ```shell yarn add start-server-and-test --dev ```
+
+    ```shell
+    yarn add start-server-and-test --dev
+    ```
+
   </TabItem>
   <TabItem value="pnpm">
-    ```shell pnpm add --save-dev start-server-and-test ```
+
+    ```shell
+    pnpm add --save-dev start-server-and-test
+    ```
+
   </TabItem>
 </Tabs>