add HTML5 doctype to all tests

[dygraphs.git] / tests / interaction.html
diff --git a/tests/interaction.html b/tests/interaction.html

index 17911a4..adfc805 100644 (file)
--- a/tests/interaction.html
+++ b/tests/interaction.html
@@ -1,3 +1,4 @@
+<!DOCTYPE html>
  <html>
    <head>
      <title>interaction model</title>