patch 8.1.0269: Ruby Kernel.#p method always returns nil

Problem:    Ruby Kernel.#p method always returns nil.
Solution:   Copy p method implementation from Ruby code. (Masataka Pocke
            Kuwabara, closes #3315)

src/version.c

@@ -794,6 +794,8 @@ static char *(features[]) =
 
 static int included_patches[] =
 {   /* Add new patch number below this line */
+/**/
+    269,
 /**/
     268,
 /**/