Small tweaks requested in internal review (#28)

Author: mit-mit

CONTRIBUTING.md

@@ -0,0 +1,19 @@
+# How to Contribute
+
+Prior to sending patches and contributions to this project, please file
+an issue in the issue tracker to ensure there is alignment with the overall
+goals of this project. Thanks!
+
+## Contributor License Agreement
+
+Contributions to this project must be accompanied by a Contributor License
+Agreement (CLA). You (or your employer) retain the copyright to your
+contribution; this simply gives us permission to use and redistribute your
+contributions as part of the project. Head over to
+<https://cla.developers.google.com/> to see your current agreements on file or
+to sign a new one.
+
+You generally only need to submit a CLA once, so if you've already submitted one
+(even if it was for a different project), you probably don't need to do it
+again.
+

LICENSE

@@ -1,4 +1,5 @@
-Copyright 2020, the Dart project authors. All rights reserved.
+Copyright 2020, the Dart project authors.
+
 Redistribution and use in source and binary forms, with or without
 modification, are permitted provided that the following conditions are
 met:
@@ -9,7 +10,7 @@ met:
       copyright notice, this list of conditions and the following
       disclaimer in the documentation and/or other materials provided
       with the distribution.
-    * Neither the name of Google Inc. nor the names of its
+    * Neither the name of Google LLC nor the names of its
       contributors may be used to endorse or promote products derived
       from this software without specific prior written permission.
 
@@ -23,4 +24,4 @@ LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
 DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
 THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
 (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
-OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.

setup.sh

@@ -1,11 +1,11 @@
 #!/bin/bash
 
+# Copyright (c) 2020, the Dart project authors.
+#
+# Use of this source code is governed by a BSD-style license that can be
+# found in the LICENSE file.
+
 ###############################################################################
-# Copyright (c) 2021, the Dart project authors.                               #
-#                                                                             #
-# Use of this source code is governed by a BSD-style license that can be.     #
-# found in the LICENSE file.                                                  #
-#                                                                             #
 # Bash script that downloads and does setup for a Dart SDK.                   #
 # Takes three params; first listed is the default:                            #
 # $1: Dart SDK version/channel: stable|beta|dev|main|<version_string>         #