Minor sample index cleanup (#1532)

web/samples_index/README.md

@@ -7,9 +7,8 @@ This tool is used to generate the visual samples index for Flutter samples.
 We use [grinder](https://pub.dev/packages/grinder) to run the build tasks:
 
 ```bash
-$ pub get
-$ pub global activate grinder
-$ grind generate
+$ dart pub get
+$ dart run grinder generate
 ```
 
 This will generate the index into `./web`
@@ -20,6 +19,7 @@ If you want to serve the index locally, you can use
 [webdev](https://pub.dev/packages/webdev):
 
 ```bash
+$ dart pub global activate grinder
 $ webdev serve
 ```
 
@@ -28,16 +28,16 @@ $ webdev serve
 You can build the complete index into a publishable directory using Grinder:
 
 ```bash
-$ grind build-release
+$ dart run grinder build-release
 ```
 
 This outputs the completely built index to `./public`.
 
 ## Generating cookbook content
 
-The cookbook articles are generated using a WebDriver script that scrapes the
-flutter.dev website. To run:
+The cookbook articles are generated using a WebDriver script
+that scrapes the docs.flutter.dev website. To run:
 
 1. Install [ChromeDriver](https://chromedriver.chromium.org/downloads)
 2. run `chromedriver --port=4444 --url-base=wd/hub --verbose`
-3. run `grind scrape-cookbook`
+3. run `dart run grinder scrape-cookbook`