fix typo and add copyright header

Signed-off-by: Sanskar Jaiswal <jaiswalsanskar078@gmail.com>

helmtestserver/server.go

@@ -80,7 +80,7 @@ func (s *HelmServer) PackageChartWithVersion(path, version string) error {
 }
 
 // PackageSignedChartWithVersion attempts to package the chart at the given path
-// with the given version and sign it using a internally generated PGP keyring, to be served
+// with the given version and sign it using an internally generated PGP keyring, to be served
 // by the HelmServer. publicKeyPath is the path where the public key should be written to, which
 // can be used to verify this chart. It returns an error in case of a packaging failure.
 func (s *HelmServer) PackageSignedChartWithVersion(path, version, publicKeyPath string) error {

helmtestserver/server_test.go

@@ -1,3 +1,19 @@
+/*
+Copyright 2020 The Flux authors
+
+Licensed under the Apache License, Version 2.0 (the "License");
+you may not use this file except in compliance with the License.
+You may obtain a copy of the License at
+
+    http://www.apache.org/licenses/LICENSE-2.0
+
+Unless required by applicable law or agreed to in writing, software
+distributed under the License is distributed on an "AS IS" BASIS,
+WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+See the License for the specific language governing permissions and
+limitations under the License.
+*/
+
 package helmtestserver
 
 import (