--- freem/doc/freem.texi	2025/05/05 14:10:34	1.50
+++ freem/doc/freem.texi	2025/05/05 14:26:59	1.51
@@ -1713,6 +1713,8 @@ Returns the Levenshtein distance between
 @cindex intrinsic functions, $ZM
 @cindex intrinsic functions, implementation-specific
 
+Purpose unknown.
+
 @node $ZNAME()
 @section $ZNAME
 @cindex $ZNAME