Add blacklist to git hook recommendatio

doc/development/setup.rst

@@ -122,13 +122,15 @@ for example, to check for any errors in any staged files when committing::
     export GIT_WORK_TREE=../
     export GIT_DIR=../.git
     source ../env/bin/activate  # Adjust to however you activate your virtual environment
-    for file in $(git diff --cached --name-only | grep -E '\.py$')
+    for file in $(git diff --cached --name-only | grep -E '\.py$' | grep -Ev "migrations|mt940\.py|pretix/settings\.py|make_testdata\.py|testutils/settings\.py|tests/settings\.py|pretix/base/models/__init__\.py")
     do
+      echo $file
       git show ":$file" | flake8 - --stdin-display-name="$file" || exit 1 # we only want to lint the staged changes, not any un-staged changes
       git show ":$file" | isort -df --check-only - | grep ERROR && exit 1 || true
     done
 
 
+
 This keeps you from accidentally creating commits violating the style guide.
 
 Working with mails