patch 9.0.1590: filetype test has trailing white space

Problem:    Filetype test has trailing white space.
Solution:   Remove trailing white space.
diff --git a/src/version.c b/src/version.c
index a4bf15b..fbe684a 100644
--- a/src/version.c
+++ b/src/version.c
@@ -696,6 +696,8 @@
 static int included_patches[] =
 {   /* Add new patch number below this line */
 /**/
+    1590,
+/**/
     1589,
 /**/
     1588,