vim-patch:8.2.2467: script generated by :mkview changes alternate file

Problem:    Script generated by :mkview changes alternate file.
Solution:   Only write :balt in the session file. (Harish Rajagopal,
            closes vim/vim#7779)
139348f3e8

src/nvim/ex_session.c

@@ -388,7 +388,8 @@ static int put_view(
     buf_T *const alt = buflist_findnr(wp->w_alt_fnum);
 
     // Set the alternate file.
-    if (alt != NULL && alt->b_fname != NULL && *alt->b_fname != NUL
+    if ((flagp == &ssop_flags) && alt != NULL && alt->b_fname != NULL
+        && *alt->b_fname != NUL
         && (fputs("balt ", fd) < 0
             || ses_fname(fd, alt, flagp, true) == FAIL)) {
       return FAIL;

src/nvim/testdir/test_mksession.vim

@@ -317,6 +317,20 @@ func Test_mkview_open_folds()
   %bwipe
 endfunc
 
+func Test_mkview_no_balt()
+  edit Xtestfile1
+  edit Xtestfile2
+
+  mkview! Xtestview
+  bdelete Xtestfile1
+
+  source Xtestview
+  call assert_equal(0, buflisted('Xtestfile1'))
+
+  call delete('Xtestview')
+  %bwipe
+endfunc
+
 " Test :mkview with a file argument.
 func Test_mkview_file()
   " Create a view with line number and a fold.