1 files changed, 6 insertions, 0 deletions

diff --git a/txr.1 b/txr.1
index 4cb5473c..0a3cff9f 100644
--- a/txr.1
+++ b/txr.1
@@ -19107,6 +19107,12 @@ is a proper list.
 traverses the
 list, and its execution will not terminate if the list is circular.
 
+These functions return
+.code nil
+for list-like sequences that are not made of actual
+.code cons
+cells.
+
 Dialect Note: in \*(TX 137 and older,
 .code proper-list-p
 is called