Rename "install" -> "get" and "update" -> "upgrade".

sdk/lib/_internal/pub/lib/src/command/list_package_dirs.dart

Index: sdk/lib/_internal/pub/lib/src/command/list_package_dirs.dart
diff --git a/sdk/lib/_internal/pub/lib/src/command/list_package_dirs.dart b/sdk/lib/_internal/pub/lib/src/command/list_package_dirs.dart
index 30c0fe9f071764f5034dda0708088398d2f0ff67..31c6916ed6b2d0fb02d98387022b42d4b607eb6a 100644
--- a/sdk/lib/_internal/pub/lib/src/command/list_package_dirs.dart
+++ b/sdk/lib/_internal/pub/lib/src/command/list_package_dirs.dart
@@ -29,7 +29,7 @@ class ListPackageDirsCommand extends PubCommand {
   Future onRun() {
     if (!entrypoint.lockFileExists) {
       log.error(JSON.encode(
-          'Package "myapp" has no lockfile. Please run "pub install" first.'));
+          'Package "myapp" has no lockfile. Please run "pub get" first.'));
       return flushThenExit(exit_codes.NO_INPUT);
     }