diff --git a/docs/merkle_patricia_dag.md b/docs/merkle_patricia_dag.md
index 911cf9a..345c188 100644
--- a/docs/merkle_patricia_dag.md
+++ b/docs/merkle_patricia_dag.md
@@ -123,7 +123,7 @@ The resulting patricia tree with infix keys is:
 	style="background-color:#FF9" stroke-width="1.5"
 		stroke-linecap="round" >
 	<g font-family="'Times New Roman'" font-size="10" font-weight="400"
-	  	fill-rule="evenodd" fill="black" >
+		fill-rule="evenodd" fill="black" >
 		<path stroke="#000000"    fill="none" d="
 			M 156,18 c10,60 -121,149 -111,209
 			M 156,18 c-8,55 70,20 60,69