Add vim modelines to markdown files
diff --git a/src/site/markdown/articles.md b/src/site/markdown/articles.md
index 14b15c3..ccbaab1 100644
--- a/src/site/markdown/articles.md
+++ b/src/site/markdown/articles.md
@@ -1,3 +1,4 @@
+<!-- vim: set syn=markdown : -->
<!--
Licensed to the Apache Software Foundation (ASF) under one or more
contributor license agreements. See the NOTICE file distributed with
diff --git a/src/site/markdown/build.md b/src/site/markdown/build.md
index 35ff300..b4e91b5 100644
--- a/src/site/markdown/build.md
+++ b/src/site/markdown/build.md
@@ -1,6 +1,4 @@
-<!--
-vim:syn=markdown:
--->
+<!-- vim: set syn=markdown : -->
<!--
Licensed to the Apache Software Foundation (ASF) under one or more
contributor license agreements. See the NOTICE file distributed with
diff --git a/src/site/markdown/changelog.md b/src/site/markdown/changelog.md
index e7799ec..d021ed1 100644
--- a/src/site/markdown/changelog.md
+++ b/src/site/markdown/changelog.md
@@ -1,3 +1,4 @@
+<!-- vim: set syn=markdown : -->
<!--
Licensed to the Apache Software Foundation (ASF) under one or more
contributor license agreements. See the NOTICE file distributed with
diff --git a/src/site/markdown/download.md.vm b/src/site/markdown/download.md.vm
index ddf32bb..0332bb2 100644
--- a/src/site/markdown/download.md.vm
+++ b/src/site/markdown/download.md.vm
@@ -1,3 +1,4 @@
+<!-- vim: set syn=markdown : -->
<!--
Licensed to the Apache Software Foundation (ASF) under one or more
contributor license agreements. See the NOTICE file distributed with
diff --git a/src/site/markdown/index.md.vm b/src/site/markdown/index.md.vm
index ebc6064..64d3705 100644
--- a/src/site/markdown/index.md.vm
+++ b/src/site/markdown/index.md.vm
@@ -1,3 +1,4 @@
+<!-- vim: set syn=markdown : -->
<!--
Licensed to the Apache Software Foundation (ASF) under one or more
contributor license agreements. See the NOTICE file distributed with