Update dartdev readme

Change-Id: I087c78a95b89d365df148ab8eee8a3314f61ce40
Reviewed-on: https://dart-review.googlesource.com/c/sdk/+/398641
Commit-Queue: Ben Konyi <[email protected]>
Reviewed-by: Ben Konyi <[email protected]>
Auto-Submit: Michael Thomsen <[email protected]>

Author: mit-mit

pkg/dartdev/README.md

@@ -3,23 +3,28 @@
 ```
 A command-line utility for Dart development.
 
-Usage: dart [vm-options] <command|dart-file> [arguments]
+Usage: dart <command|dart-file> [arguments]
 
 Global options:
--h, --help                 Print this usage information.
--v, --verbose              Show additional command output.
-    --version              Print the Dart SDK version.
-    --enable-analytics     Enable analytics.
-    --disable-analytics    Disable analytics.
+-v, --verbose               Show additional command output.
+    --version               Print the Dart SDK version.
+    --enable-analytics      Enable analytics.
+    --disable-analytics     Disable analytics.
+    --suppress-analytics    Disallow analytics for this `dart *` run without changing the analytics configuration.
+-h, --help                  Print this usage information.
 
 Available commands:
-  analyze   Analyze the project's Dart code.
-  compile   Compile Dart to various formats.
-  create    Create a new project.
-  format    Idiomatically format Dart source code.
-  pub       Work with packages.
-  run       Run a Dart program.
-  test      Run tests in this package.
+  analyze    Analyze Dart code in a directory.
+  compile    Compile Dart to various formats.
+  create     Create a new Dart project.
+  devtools   Open DevTools (optionally connecting to an existing application).
+  doc        Generate API documentation for Dart projects.
+  fix        Apply automated fixes to Dart source code.
+  format     Idiomatically format Dart source code.
+  info       Show diagnostic information about the installed tooling.
+  pub        Work with packages.
+  run        Run a Dart program.
+  test       Run tests for a project.
 
 Run "dart help <command>" for more information about a command.
 See https://dart.dev/tools/dart-tool for detailed documentation.