patch 8.2.0777: terminal test fails

Problem:    Terminal test fails.
Solution:   Adjust character position for double-wide characters.
diff --git a/src/testdir/test_terminal.vim b/src/testdir/test_terminal.vim
index 33ff52f..ab1961a 100644
--- a/src/testdir/test_terminal.vim
+++ b/src/testdir/test_terminal.vim
@@ -938,10 +938,10 @@
   call WaitForAssert({-> assert_equal(txt, term_getline(buf, lnum[1] + 1))}, 1000)
   let l = term_scrape(buf, lnum[1] + 1)
   call assert_equal("\u304b\u3099", l[0].chars)
-  call assert_equal("\u304e", l[1].chars)
-  call assert_equal("\u304f\u3099", l[2].chars)
-  call assert_equal("\u3052", l[3].chars)
-  call assert_equal("\u3053\u3099", l[4].chars)
+  call assert_equal("\u304e", l[2].chars)
+  call assert_equal("\u304f\u3099", l[3].chars)
+  call assert_equal("\u3052", l[5].chars)
+  call assert_equal("\u3053\u3099", l[6].chars)
 
   " \u00a0 + composing
   let txt = "abc\u00a0\u0308"