Fix types and compatibility with MkDocs 1.6

mkdocs_literate_nav/plugin.py

@@ -83,9 +83,15 @@ def get_nav_for_dir(path: str) -> tuple[str, str] | None:
  # https://github.com/mkdocs/mkdocs/blob/ff0b726056/mkdocs/structure/nav.py#L113
  Page(None, file, {}) # type: ignore[arg-type]
 
- # https://github.com/mkdocs/mkdocs/blob/fa5aa4a26e/mkdocs/structure/pages.py#L120
- with open(file.abs_src_path, encoding="utf-8-sig") as f:
- return nav_file_name, f.read()
+ try: # MkDocs 1.6+
+ content = file.content_string
+ except AttributeError:
+ # https://github.com/mkdocs/mkdocs/blob/fa5aa4a26e/mkdocs/structure/pages.py#L120
+ assert file.abs_src_path is not None
+ with open(file.abs_src_path, encoding="utf-8-sig") as f:
+ content = f.read()
+
+ return nav_file_name, content
 
  globber = MkDocsGlobber(files)
  nav_parser = parser.NavParser(