patch 8.2.2160: various typos

Problem:    Various typos.
Solution:   Fix spelling mistakes. (closes #7494)
diff --git a/src/testdir/test_netbeans.vim b/src/testdir/test_netbeans.vim
index d56b468..d792ab9 100644
--- a/src/testdir/test_netbeans.vim
+++ b/src/testdir/test_netbeans.vim
@@ -839,7 +839,7 @@
   call s:run_server('Nb_file_auth')
 endfunc
 
-" Test for quiting Vim with an open netbeans connection
+" Test for quitting Vim with an open netbeans connection
 func Nb_quit_with_conn(port)
   call delete("Xnetbeans")
   call writefile([], "Xnetbeans")