patch 9.0.0828: various typos

Problem:    Various typos.
Solution:   Correct typos. (closes #11432)
diff --git a/src/testdir/test_vimscript.vim b/src/testdir/test_vimscript.vim
index 1d71450..4aa6bca 100644
--- a/src/testdir/test_vimscript.vim
+++ b/src/testdir/test_vimscript.vim
@@ -6882,7 +6882,7 @@
 "	    Undefined behavior was detected by ubsan with line continuation
 "	    after an empty line.
 "-------------------------------------------------------------------------------
-func Test_script_emty_line_continuation()
+func Test_script_empty_line_continuation()
 
     \
 endfunc