Merge #12093: Fix incorrect Markdown link

4aa64557b Fix incorrect Markdown link (practicalswift)

Pull request description:

  Fix incorrect Markdown link.

Tree-SHA512: c6c4e4ddf215fdffa49aa55aed590656356bb7e898b2843a7a6c669eff9f401fe4772a9298893e9fe7f7bc5ea25f7dd87f792241c09e4cd83e7609633556a5bb

test/functional/README.md

@@ -17,7 +17,7 @@ don't have test cases for.
 
 #### Style guidelines
 
-- Where possible, try to adhere to [PEP-8 guidelines]([https://www.python.org/dev/peps/pep-0008/)
+- Where possible, try to adhere to [PEP-8 guidelines](https://www.python.org/dev/peps/pep-0008/)
 - Use a python linter like flake8 before submitting PRs to catch common style
   nits (eg trailing whitespace, unused imports, etc)
 - Avoid wildcard imports where possible