update comment
diff --git a/stack.sh b/stack.sh
index 4b73102..6c7dcdf 100755
--- a/stack.sh
+++ b/stack.sh
@@ -324,7 +324,7 @@
         # thinks the pyc files are correct using them)
         sudo git clean -f -d
         git checkout -f origin/$GIT_BRANCH
-        # a local branch might not exist for $3
+        # a local branch might not exist
         git branch -D $GIT_BRANCH || true
         git checkout -b $GIT_BRANCH
     fi