commit b1c61c0b77648f7345a7c42cce941e32d87c84bf
Author: Alex Eagle <eagle@post.harvard.edu>
Date:   Wed Aug 18 17:55:13 2021 -0700

    Merge the private attribute

diff --git a/rule/merge.go b/rule/merge.go
index d5fbe94..e13e547 100644
--- a/rule/merge.go
+++ b/rule/merge.go
@@ -79,6 +79,8 @@ func MergeRules(src, dst *Rule, mergeable map[string]bool, filename string) {
 			}
 		}
 	}
+
+	dst.private = src.private
 }
 
 // mergeExprs combines information from src and dst and returns a merged