Wording tweaks

doc/04-schema.md

@@ -290,7 +290,11 @@ If one of your dependencies has a dependency on an unstable package you need to
 explicitly require it as well, along with its sufficient stability flag.
 
 Example:
-"doctrine/doctrine-fixtures-bundle" requires "doctrine/data-fixtures":"dev-master" so inside the root-composer.json you need:
+
+Assuming `doctrine/doctrine-fixtures-bundle` requires `"doctrine/data-fixtures": "dev-master"`
+then inside the root composer.json you need to add the second line below to allow dev
+releases for the `doctrine/data-fixtures` package :
+
 ```json
 {
     "require": {