Fix a usage example

moritz · moritz · commit 3f80b9a2f138 · 2015-10-18T15:11:14.000+02:00
diff --git a/doc/Type/Attribute.pod b/doc/Type/Attribute.pod
@@ -102,7 +102,7 @@ Defined as:
 
 Usage:
 
-    ATTRIBUTE.get_value
+    my $val = ATTRIBUTE.get_value(OBJECT)
 
 Returns the value stored in this attribute of object C<$instance>.
 
