updated for version 7.3.591
Problem:    Can only move to a tab by absolute number.
Solution:   Move a number of tabs to the left or the right. (Lech Lorens)
diff --git a/src/testdir/test62.ok b/src/testdir/test62.ok
index 7625cd2..0ac1fcb 100644
--- a/src/testdir/test62.ok
+++ b/src/testdir/test62.ok
@@ -8,3 +8,13 @@
 tab drop 1: pass
 tab drop 2: pass
 tab drop 3: pass
+1
+6
+4
+8
+10
+1
+10
+4
+6
+E474 caught.