diff --git a/runtime/doc/insert.txt b/runtime/doc/insert.txt
index d2959df..7ada7b0 100644
--- a/runtime/doc/insert.txt
+++ b/runtime/doc/insert.txt
@@ -1103,7 +1103,7 @@
 	empty		when non-zero this match will be added even when it is
 			an empty string
 
-All of these except 'icase', 'dup' and 'empty' must be a string.  If an item
+All of these except "icase", "dup" and "empty" must be a string.  If an item
 does not meet these requirements then an error message is given and further
 items in the list are not used.  You can mix string and Dictionary items in
 the returned list.