fix(test): Fix test_never_render to get path as string, exclude PYC files from static downloads

This test code never actually tested the behaviour for two reasons:
- first, the page had an error which meant that a 500 Error page was returned (because `path` is not a string)
- second, every page contains the string "400" because it's contained in some of the icons.svg icons!

I also found a minor related bug in static_page.py, allowing people to download PYC files (pycache)

frappe/tests/test_website.py

@@ -340,8 +340,9 @@ class TestWebsite(FrappeTestCase):
 		FILES_TO_SKIP = choices(list(WWW.glob("**/*.py*")), k=10)
 
 		for suffix in FILES_TO_SKIP:
-			content = get_response_content(suffix.relative_to(WWW))
-			self.assertIn("404", content)
+			path: str = suffix.relative_to(WWW).as_posix()
+			content = get_response_content(path)
+			self.assertIn("<title>Not Found</title>", content)
 
 	def test_metatags(self):
 		content = get_response_content("/_test/_test_metatags")

frappe/website/page_renderers/static_page.py

@@ -8,7 +8,7 @@ import frappe
 from frappe.website.page_renderers.base_renderer import BaseRenderer
 from frappe.website.utils import is_binary_file
 
-UNSUPPORTED_STATIC_PAGE_TYPES = ("html", "md", "js", "xml", "css", "txt", "py", "json")
+UNSUPPORTED_STATIC_PAGE_TYPES = ("html", "md", "js", "xml", "css", "txt", "py", "pyc", "json")
 
 
 class StaticPage(BaseRenderer):