patch 8.1.2293: join adds trailing space when second line is empty

Problem:    Join adds trailing space when second line is empty. (Brennan
            Vincent)
Solution:   Do not add a trailing space.
diff --git a/src/version.c b/src/version.c
index 0e9b27b..31133c5 100644
--- a/src/version.c
+++ b/src/version.c
@@ -742,6 +742,8 @@
 static int included_patches[] =
 {   /* Add new patch number below this line */
 /**/
+    2293,
+/**/
     2292,
 /**/
     2291,