patch 7.4.2189
Problem:    Cannot detect encoding in a fifo.
Solution:   Extend the stdin way of detecting encoding to fifo.  Add a test
            for detecting encoding on stdin and fifo. (Ken Takata)
diff --git a/src/version.c b/src/version.c
index 4d4c16e..72ec382 100644
--- a/src/version.c
+++ b/src/version.c
@@ -764,6 +764,8 @@
 static int included_patches[] =
 {   /* Add new patch number below this line */
 /**/
+    2189,
+/**/
     2188,
 /**/
     2187,