patch 9.0.0828: various typos

Problem:    Various typos.
Solution:   Correct typos. (closes #11432)
diff --git a/src/testdir/test_langmap.vim b/src/testdir/test_langmap.vim
index 2284704..aaed77e 100644
--- a/src/testdir/test_langmap.vim
+++ b/src/testdir/test_langmap.vim
@@ -52,7 +52,7 @@
   set langmap=RL
   let g:counter = 0
   nnoremap L;L <Cmd>let g:counter += 1<CR>
-  nnoremap <C-L> <Cmd>throw 'This mapping shoud not be triggered'<CR>
+  nnoremap <C-L> <Cmd>throw 'This mapping should not be triggered'<CR>
 
   " 'langmap' is applied to keys without modifiers when matching a mapping
   call feedkeys('R;R', 'tx')