IDL compiler: remove blank line for void methods

Source/bindings/scripts/code_generator_v8.pm

Index: Source/bindings/scripts/code_generator_v8.pm
diff --git a/Source/bindings/scripts/code_generator_v8.pm b/Source/bindings/scripts/code_generator_v8.pm
index c714c34f1a180717b90315e67717164f278979f9..5956d1b24112fa7670f136c9a7633eda26ae316c 100644
--- a/Source/bindings/scripts/code_generator_v8.pm
+++ b/Source/bindings/scripts/code_generator_v8.pm
@@ -5190,7 +5190,9 @@ END
         $nativeValue = NativeToJSValue($function->type, $function->extendedAttributes, $return, $indent, "", "args.Holder()", "args.GetIsolate()", "args", 0, $forMainWorldSuffix, "return");
     }
 
-    $code .= $nativeValue . "\n";
+    if ($nativeValue) {  # Skip blank line for void return type
+        $code .= $nativeValue . "\n";
+    }
     $code .= $indent . "return;\n";
 
     return $code;