fix(directive): use correct file path for include directive

Author: lepture

src/mistune/directives/include.py

@@ -72,6 +72,7 @@ def parse(
 
             ext = os.path.splitext(dest)[1]
             if ext in {".md", ".markdown", ".mkd"}:
+                content = content.replace("\r\n", "\n").replace("\r", "\n")
                 new_state = state.child_state(content)
                 previous_file = new_state.env.get("__file__")
                 new_state.env["__file__"] = dest

tests/test_security_include.py

@@ -58,10 +58,10 @@ def test_include_rejects_circular_references(self):
         with tempfile.TemporaryDirectory() as tmpdir:
             a = os.path.join(tmpdir, "a.md")
             b = os.path.join(tmpdir, "b.md")
-            with open(a, "w") as f:
-                f.write(".. include:: b.md\n")
-            with open(b, "w") as f:
-                f.write(".. include:: a.md\n")
+            with open(a, "wb") as f:
+                f.write(b".. include:: b.md\r\n")
+            with open(b, "wb") as f:
+                f.write(b".. include:: a.md\r\n")
 
             md = create_markdown(plugins=[RSTDirective([Include()])])
             html = md.read(a)[0]