patch 8.0.1048: no test for what 8.0.1020 fixes

Problem:    No test for what 8.0.1020 fixes.
Solution:   Add test_feedinput().  Add a test. (Ozaki Kiichi, closes #2046)
diff --git a/src/version.c b/src/version.c
index 2034504..ce53bb8 100644
--- a/src/version.c
+++ b/src/version.c
@@ -770,6 +770,8 @@
 static int included_patches[] =
 {   /* Add new patch number below this line */
 /**/
+    1048,
+/**/
     1047,
 /**/
     1046,