patch 8.0.1765: CTRL-G j in Insert mode is incorrect when 'virtualedit' set

Problem:    CTRL-G j in Insert mode is incorrect when 'virtualedit' is set.
Solution:   Take coladd into account. (Christian Brabandt, closes #2743)
diff --git a/src/testdir/test_virtualedit.vim b/src/testdir/test_virtualedit.vim
index 2b8849f..d490252 100644
--- a/src/testdir/test_virtualedit.vim
+++ b/src/testdir/test_virtualedit.vim
@@ -41,3 +41,21 @@
   bwipe!
   set virtualedit=
 endfunc
+
+func Test_edit_CTRL_G()
+  new
+  set virtualedit=insert
+  call setline(1, ['123', '1', '12'])
+  exe "normal! ggA\<c-g>jx\<c-g>jx"
+  call assert_equal(['123', '1  x', '12 x'], getline(1,'$'))
+
+  set virtualedit=all
+  %d_
+  call setline(1, ['1', '12'])
+  exe "normal! ggllix\<c-g>jx"
+  call assert_equal(['1 x', '12x'], getline(1,'$'))
+
+
+  bwipe!
+  set virtualedit=
+endfunc