diff --git a/runtime/doc/change.txt b/runtime/doc/change.txt
index ff0c44a..bef7500 100644
--- a/runtime/doc/change.txt
+++ b/runtime/doc/change.txt
@@ -1720,6 +1720,17 @@
 		         // in the list ~
 	Becomes:
 		int i;   // the index in the list ~
+p	Don't break lines at single spaces that follow periods.  This is
+	intended to complement 'joinspaces' and |cpo-J|, for prose with
+	sentences separated by two spaces.  For example, with 'textwidth' set
+	to 28: >
+		Surely you're joking, Mr. Feynman!
+<	Becomes: >
+		Surely you're joking,
+		Mr. Feynman!
+<	Instead of: >
+		Surely you're joking, Mr.
+		Feynman!
 
 
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