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.

src/version.c

@@ -741,6 +741,8 @@ static char *(features[]) =
 
 static int included_patches[] =
 {   /* Add new patch number below this line */
+/**/
+    2293,
 /**/
     2292,
 /**/