Merge branch 'flake8_in_CI' of https://github.com/bobhy/xonsh into flake8_in_CI

.github/workflows/black.yml

@@ -12,4 +12,4 @@ jobs:
     - name: Black Check
       uses: "lgeiger/black-action@master"
       with:
-        args: "--check --exclude=xonsh/ply/ xonsh/ xontrib/"
+        args: "--check xonsh/ xontrib/"

.travis.yml

@@ -50,5 +50,4 @@ script:
       doctr deploy --deploy-repo xonsh/xonsh-docs .;
     else
       xonsh run-tests.xsh --timeout=10;
-      flake8;
     fi

run-tests.xsh

@@ -26,3 +26,5 @@ for fname in run_separately:
 ![pytest @(replace_args(0)) @(ignores)]
 for index, fname in enumerate(run_separately):
     ![pytest @(replace_args(index+1)) @(fname)]
+echo "---------- Running flake8 ----------"
+python -m flake8