diff --git a/examples/arithmetics.pegjs b/examples/arithmetics.pegjs
index 8d05806..597f7d4 100644
--- a/examples/arithmetics.pegjs
+++ b/examples/arithmetics.pegjs
@@ -39,6 +39,6 @@ Factor
 
 Integer "integer"
   = [0-9]+ { return parseInt(text(), 10); }
-  
+
 _ "whitespace"
   = [ \t\n\r]*