Suggest tox --devenv instead of tox -e venv

CONTRIBUTING.md

@@ -16,8 +16,8 @@
 This is useful for running specific tests.  The easiest way to set this up
 is to run:
 
-1. `tox -e venv`
-2. `. venv-pre_commit/bin/activate`
+1. `tox --devenv venv`  (note: requires tox>=3.13)
+2. `. venv/bin/activate`
 
 This will create and put you into a virtualenv which has an editable
 installation of pre-commit.  Hack away!  Running `pre-commit` will reflect

azure-pipelines.yml

@@ -10,7 +10,7 @@ resources:
       type: github
       endpoint: github
       name: asottile/azure-pipeline-templates
-      ref: refs/tags/v0.0.14
+      ref: refs/tags/v0.0.15
 
 jobs:
 - template: job--pre-commit.yml@asottile

tox.ini

@@ -15,10 +15,6 @@ skip_install = true
 deps = pre-commit
 commands = pre-commit run --all-files --show-diff-on-failure
 
-[testenv:venv]
-envdir = venv-pre_commit
-commands =
-
 [pep8]
 ignore = E265,E501,W504