patch 8.2.2160: various typos

Problem:    Various typos.
Solution:   Fix spelling mistakes. (closes #7494)
diff --git a/src/testdir/test_autocmd.vim b/src/testdir/test_autocmd.vim
index 1873a7a..f796325 100644
--- a/src/testdir/test_autocmd.vim
+++ b/src/testdir/test_autocmd.vim
@@ -2324,7 +2324,7 @@
   call writefile(lines, 'XSafeState')
   let buf = RunVimInTerminal('-S XSafeState', #{rows: 6})
 
-  " Sometimes we loop to handle a K_IGNORE, SafeState may be trigered once or
+  " Sometimes we loop to handle a K_IGNORE, SafeState may be triggered once or
   " more often.
   call term_sendkeys(buf, ":echo g:safe\<CR>")
   call WaitForAssert({-> assert_match('^\d ', term_getline(buf, 6))}, 1000)