patch 7.4.1862

Problem:    string() with repeated argument does not give a result usable by
            eval().
Solution:   Refactor echo_striong and tv2string(), moving the common part to
            echo_string_core(). (Ken Takata)

src/version.c

@@ -753,6 +753,8 @@ static char *(features[]) =
 
 static int included_patches[] =
 {   /* Add new patch number below this line */
+/**/
+    1862,
 /**/
     1861,
 /**/