patch 9.0.0828: various typos

Problem:    Various typos.
Solution:   Correct typos. (closes #11432)
diff --git a/src/testdir/test_window_cmd.vim b/src/testdir/test_window_cmd.vim
index 0d4c278..7aecb92 100644
--- a/src/testdir/test_window_cmd.vim
+++ b/src/testdir/test_window_cmd.vim
@@ -1267,7 +1267,7 @@
 
 " Test for jumping to a vertical/horizontal neighbor window based on the
 " current cursor position
-func Test_window_goto_neightbor()
+func Test_window_goto_neighbor()
   %bw!
 
   " Vertical window movement