Provide flake8 install instructions. (#18629)

Summary:
Pull Request resolved: https://github.com/pytorch/pytorch/pull/18629
ghimport-source-id: 66a8871c56ffcfa7d4bfdf601e180fae99194e28

Stack from [ghstack](https://github.com/ezyang/ghstack):
* **#18629 Provide flake8 install instructions.**
* #18628 Delete duplicated technical content from contribution_guide.rst

Signed-off-by: Edward Z. Yang <ezyang@fb.com>
Differential Revision: D14701004

fbshipit-source-id: b64292f0ef01b7894cf6b9ff8d5fd9e921c8d162

diff --git a/CONTRIBUTING.md b/CONTRIBUTING.md
index 84d68eb..594e668 100644 (file)
--- a/CONTRIBUTING.md
+++ b/CONTRIBUTING.md
@@ -511,10 +511,13 @@ formatting and semantic checking of code. We provide a pre-commit git hook for
 performing these checks, before a commit is created:
 
   ```bash
-  pip install flake8-mypy
   ln -s ../../tools/git-pre-commit .git/hooks/pre-commit
   ```
 
+You'll need to install an appropriately configured flake8; see
+[Lint as you type](https://github.com/pytorch/pytorch/wiki/Lint-as-you-type)
+for documentation on how to do this.
+
 ## Caffe2 notes
 
 In 2018, we merged Caffe2 into the PyTorch source repository. While the