Reindent the note and add correct syntax to one more note

doc/index.rst

@@ -87,8 +87,10 @@ you can exclude them from asset mapper:
                 - '*/assets/styles/_*.scss'
                 - '*/assets/styles/**/_*.scss'
 
-Note: be sure not to exclude your *main* SCSS file (e.g. ``assets/styles/app.scss``):
-this *is* used in AssetMapper and its contents are swapped for the final, built CSS.
+.. note::
+
+    Be sure not to exclude your *main* SCSS file (e.g. ``assets/styles/app.scss``):
+    this *is* used in AssetMapper and its contents are swapped for the final, built CSS.
 
 Using Bootstrap Sass
 --------------------
@@ -166,13 +168,13 @@ The main option is ``root_sass`` option, which defaults to ``assets/styles/app.s
 
 .. note::
 
-The option ``root_sass`` also supports array of paths that represents different source Sass files
+    The ``root_sass`` option also supports an array of paths that represents different source Sass files:
 
-.. code-block:: yaml
+    .. code-block:: yaml
 
-    symfony_cast:
-        root_sass:
-            - '%kernel.project_dir%/assets/scss/app.scss'
+        symfony_cast:
+            root_sass:
+                - '%kernel.project_dir%/assets/scss/app.scss'
 
 Sass CLI Options
 ~~~~~~~~~~~~~~~~