patch 8.0.0428: git and hg see new files after running tests

Problem:    Git and hg see new files after running tests. (Manuel Ortega)
Solution:   Add the generated file to .hgignore (or .gitignore). Delete the
            resulting verbose file. (Christian Brabandt)  Improve dependency
            on opt_test.vim.  Reset the 'more' option.
diff --git a/src/testdir/Make_dos.mak b/src/testdir/Make_dos.mak
index 7c44024..1a98ebb 100644
--- a/src/testdir/Make_dos.mak
+++ b/src/testdir/Make_dos.mak
@@ -94,6 +94,7 @@
 	-if exist test.log del test.log
 	-if exist messages del messages
 	-if exist benchmark.out del benchmark.out
+	-if exist opt_test.vim del opt_test.vim
 
 nolog:
 	-if exist test.log del test.log
@@ -127,3 +128,6 @@
 	@echo "$(VIMPROG)" > vimcmd
 	$(VIMPROG) -u NONE -U gui_init.vim $(NO_PLUGINS) -S runtest.vim $*.vim
 	@del vimcmd
+
+opt_test.vim: ../option.c gen_opt_test.vim
+	$(VIMPROG) -u gen_opt_test.vim --noplugin --not-a-term