*: always backquote stdin, stdout and stderr (#9584)

pages/common/autopep8.md

@@ -3,7 +3,7 @@
 > Format Python code according to the PEP 8 style guide.
 > More information: <https://github.com/hhatto/autopep8>.
 
-- Format a file to stdout, with a custom maximum line length:
+- Format a file to `stdout`, with a custom maximum line length:
 
 `autopep8 {{path/to/file.py}} --max-line-length {{length}}`