diff --git a/tools/docker/Dockerfile.centos6 b/tools/docker/Dockerfile.centos6
index 459301452c6..8f520569ef1 100644
--- a/tools/docker/Dockerfile.centos6
+++ b/tools/docker/Dockerfile.centos6
@@ -5,9 +5,9 @@
 # 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
-# 
+#
 # 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
diff --git a/tools/docker/Dockerfile.marvin b/tools/docker/Dockerfile.marvin
index 20dc56e8605..4293f563274 100644
--- a/tools/docker/Dockerfile.marvin
+++ b/tools/docker/Dockerfile.marvin
@@ -5,9 +5,9 @@
 # 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
-# 
+#
 # 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
diff --git a/tools/docker/init.sh_centos6 b/tools/docker/init.sh_centos6
index 423808fe554..52189ca2a52 100755
--- a/tools/docker/init.sh_centos6
+++ b/tools/docker/init.sh_centos6
@@ -6,9 +6,9 @@
 # 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
-# 
+#
 # 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