patch 7.4.1896

Problem:    Invoking mark_adjust() when adding a new line below the last line
            is pointless.
Solution:   Skip calling mark_adjust() when appending below the last line.

src/version.c

@@ -753,6 +753,8 @@ static char *(features[]) =
 
 static int included_patches[] =
 {   /* Add new patch number below this line */
+/**/
+    1896,
 /**/
     1895,
 /**/