TST: Fix failing lunr_search test

Iteration order of `os.walk()` is platform dependent.

Author: kernc

pdoc/test/__init__.py

@@ -254,10 +254,8 @@ def test_lunr_search(self):
             files = self.PUBLIC_FILES + ["doc-search.html", "index.js"]
             self._basic_html_assertions(expected_files=files)
             self._check_files(exclude_patterns=['class="gcse-search"'])
-            self._check_files(
-                include_patterns=['URLS=[\n"example_pkg/index.html",\n'
-                                  '"example_pkg/module.html",\n"example_pkg/subpkg/index.html"'],
-                file_pattern='index.js')
+            self._check_files(include_patterns=['URLS=[\n"example_pkg/index.html",\n"example_pkg/'],
+                              file_pattern='index.js')
             self._check_files(include_patterns=["'../doc-search.html#'"],
                               file_pattern='example_pkg/index.html')
             self._check_files(include_patterns=["'../doc-search.html#'"],