bake/serve: Make previewed and baked URLs consistent. The preview server now handles the `pretty_urls` setting correctly instead of forcing it. The `trailing_slash` and `pagination_suffix` setting are also doing the same between the 2 systems.

[pytest]
norecursedirs = .* _darcs CVS .svn .git .hg *.egg-info dist build node_modules venv tmp* {args}