patch 8.0.0625: shellescape() always escapes a newline

Problem:    shellescape() always escapes a newline, which does not work with
            some shells. (Harm te Hennepe)
Solution:   Only escape a newline when the "special" argument is non-zero.
            (Christian Brabandt, closes #1590)

src/version.c

@@ -764,6 +764,8 @@ static char *(features[]) =
 
 static int included_patches[] =
 {   /* Add new patch number below this line */
+/**/
+    625,
 /**/
     624,
 /**/