Problem: Tests are flaky because of using a common file name.
Solution: Rename files and directories to be more unique.
61abe7d8f8
Cherry-pick Test_custom_complete_autoload() from patch 8.2.4584.
Cherry-pick test_delete.vim & test_edit.vim changes from patch 9.0.0323.
Cherry-pick test_edit.vim changes from patch 8.2.3637.
Co-authored-by: Bram Moolenaar <Bram@vim.org>
Problem: Test_xrestore sometimes fails.
Solution: Mark the test as flayky. Move marking test as flaky to the test
instead of listing them in runtest.
f08b0eb869
Co-authored-by: Bram Moolenaar <Bram@vim.org>