replaced tabs with spaces in plugin-nestedstructure/pom.xml
diff --git a/plugin-nestedstructure/pom.xml b/plugin-nestedstructure/pom.xml
index 216689d..c0084c5 100644
--- a/plugin-nestedstructure/pom.xml
+++ b/plugin-nestedstructure/pom.xml
@@ -31,10 +31,10 @@
     <properties>
         <commons.codec.version>1.11</commons.codec.version>
         <commons.logging.version>1.1.1</commons.logging.version>
-	<json.path.version>2.9.0</json.path.version>
+        <json.path.version>2.9.0</json.path.version>
         <maven.compiler.source>8</maven.compiler.source>
         <maven.compiler.target>8</maven.compiler.target>
-	<nashhorn.core.version>15.4</nashhorn.core.version>
+        <nashhorn.core.version>15.4</nashhorn.core.version>
     </properties>
 
     <dependencies>