Fix some formatting issues.

Change-Id: I576bc04680e10f4e3ef57dac81e2b3c4f1d884d4

dart.md

@@ -40,15 +40,15 @@ providing the necessary package coverage for the entire tree.
 Additionally, projects may request third-party dependencies to be imported
 through the following procedure:
 1. create a `dart_dependencies.yaml` file in the project
-1. add the desired dependencies in that file:
+2. add the desired dependencies in that file:
 ```
 name: my_project
 dependencies:
   foo: ^4.0.0
   bar: >=0.1.0
 ```
-1. add a reference to the file in `//scripts/update_dart_packages.py`
-1. run that script
+3. add a reference to the file in `//scripts/update_dart_packages.py`
+4. run that script
 
 
 ## Analysis