vim-patch:8.2.2185: BufUnload is not triggered for the quickfix dummy buffer

Problem:    BufUnload is not triggered for the quickfix dummy buffer.
Solution:   Do trigger BufUnload. (Pontus Leitzler,closes vim/vim#7518, closes vim/vim#7517)
            Fix white space around "=".
1cfb9bb5c0

src/nvim/buffer.c

@@ -5665,7 +5665,7 @@ bool buf_contents_changed(buf_T *buf)
 void
 wipe_buffer(
     buf_T *buf,
-    int aucmd                   // When true trigger autocommands.
+    bool aucmd                  // When true trigger autocommands.
 )
 {
   if (!aucmd) {

src/nvim/ex_cmds.c

@@ -4773,8 +4773,9 @@ void ex_help(exarg_T *eap)
    * window. */
   if (empty_fnum != 0 && curbuf->b_fnum != empty_fnum) {
     buf = buflist_findnr(empty_fnum);
-    if (buf != NULL && buf->b_nwindows == 0)
-      wipe_buffer(buf, TRUE);
+    if (buf != NULL && buf->b_nwindows == 0) {
+      wipe_buffer(buf, true);
+    }
   }
 
   /* keep the previous alternate file */

src/nvim/quickfix.c

@@ -5713,7 +5713,7 @@ static void wipe_dummy_buffer(buf_T *buf, char_u *dirname_start)
     // work when got_int is set.
     enter_cleanup(&cs);
 
-    wipe_buffer(buf, FALSE);
+    wipe_buffer(buf, true);
 
     // Restore the error/interrupt/exception state if not discarded by a
     // new aborting error, interrupt, or uncaught exception.

src/nvim/testdir/test_autocmd.vim

@@ -196,6 +196,29 @@ func Test_autocmd_bufunload_avoiding_SEGV_02()
   bwipe! a.txt
 endfunc
 
+func Test_autocmd_dummy_wipeout()
+  " prepare files
+  call writefile([''], 'Xdummywipetest1.txt')
+  call writefile([''], 'Xdummywipetest2.txt')
+  augroup test_bufunload_group
+    autocmd!
+    autocmd BufUnload * call add(s:li, "bufunload")
+    autocmd BufDelete * call add(s:li, "bufdelete")
+    autocmd BufWipeout * call add(s:li, "bufwipeout")
+  augroup END
+
+  let s:li = []
+  split Xdummywipetest1.txt
+  silent! vimgrep /notmatched/ Xdummywipetest*
+  call assert_equal(["bufunload", "bufwipeout"], s:li)
+
+  bwipeout
+  call delete('Xdummywipetest1.txt')
+  call delete('Xdummywipetest2.txt')
+  au! test_bufunload_group
+  augroup! test_bufunload_group
+endfunc
+
 func Test_win_tab_autocmd()
   let g:record = []