Fix markdown files with a typo. in the Hash license header. (#20)

diff --git a/CONTRIBUTING.md b/CONTRIBUTING.md
index df6e905..3c0595b 100644
--- a/CONTRIBUTING.md
+++ b/CONTRIBUTING.md
@@ -1,18 +1,19 @@
 <!--
 #
-# Licensed to the Apache Software Foundation (ASF) under one or more contributor
-# license agreements.  See the NOTICE file distributed with this work for additional
-# information regarding copyright ownership.  The ASF licenses this file to you
-# 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:
+# Licensed to the Apache Software Foundation (ASF) under one or more
+# contributor license agreements.  See the NOTICE file distributed with
+# this work for additional information regarding copyright ownership.
+# The ASF licenses this file to You 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
+#     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.
+# 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.
 #
 -->
 
diff --git a/README.md b/README.md
index fdf9050..cc6054c 100644
--- a/README.md
+++ b/README.md
@@ -1,18 +1,19 @@
 <!--
 #
-# Licensed to the Apache Software Foundation (ASF) under one or more contributor
-# license agreements.  See the NOTICE file distributed with this work for additional
-# information regarding copyright ownership.  The ASF licenses this file to you
-# 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:
+# Licensed to the Apache Software Foundation (ASF) under one or more
+# contributor license agreements.  See the NOTICE file distributed with
+# this work for additional information regarding copyright ownership.
+# The ASF licenses this file to You 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
+#     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.
+# 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.
 #
 -->
 
diff --git a/gradle/README.md b/gradle/README.md
index 23cce13..14842f1 100644
--- a/gradle/README.md
+++ b/gradle/README.md
@@ -1,18 +1,19 @@
 <!--
 #
-# Licensed to the Apache Software Foundation (ASF) under one or more contributor
-# license agreements.  See the NOTICE file distributed with this work for additional
-# information regarding copyright ownership.  The ASF licenses this file to you
-# 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:
+# Licensed to the Apache Software Foundation (ASF) under one or more
+# contributor license agreements.  See the NOTICE file distributed with
+# this work for additional information regarding copyright ownership.
+# The ASF licenses this file to You 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
+#     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.
+# 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.
 #
 -->