patch 8.2.2160: various typos

Problem:    Various typos.
Solution:   Fix spelling mistakes. (closes #7494)
diff --git a/src/testdir/test_vimscript.vim b/src/testdir/test_vimscript.vim
index e50e4d5..dba8c73 100644
--- a/src/testdir/test_vimscript.vim
+++ b/src/testdir/test_vimscript.vim
@@ -7374,7 +7374,7 @@
   endtry
   call assert_equal(1, caught_e884)
 
-  " function name folowed by #
+  " function name followed by #
   let caught_e128 = 0
   try
     func! test2() "#