fixup! Make cursor_sharing default conditional on prepared_statements

Author: yahonda

lib/active_record/connection_adapters/oracle_enhanced_adapter.rb

@@ -867,9 +867,9 @@ def check_version # :nodoc:
           # instance-level cursor_sharing setting.
         when nil
           # No explicit :cursor_sharing. Apply the legacy "force" default only
-          # when the caller has explicitly disabled prepared_statements; with
-          # prepared_statements on (the Rails default), AR is binding literals
-          # already and the adapter no longer overrides the server value.
+          # when the caller has explicitly opted out of prepared_statements;
+          # otherwise AR is binding literals via prepared statements and the
+          # adapter no longer overrides the server's cursor_sharing.
           if @config[:prepared_statements] == false
             execute("alter session set cursor_sharing = FORCE", "SCHEMA")
           end