Let deploy_space.sh run with untracked files present

Untracked files are never pushed to the Space, so they should not block a
deploy.

scripts/deploy_space.sh

@@ -18,8 +18,9 @@ TMP_BRANCH="space-deploy-$$"
 git remote get-url "$REMOTE" >/dev/null
 git rev-parse --verify "$BRANCH" >/dev/null
 
-if [ -n "$(git status --porcelain)" ]; then
-    echo "working tree is dirty; commit or stash first" >&2
+# Untracked files never reach the Space, so only tracked changes matter here.
+if [ -n "$(git status --porcelain --untracked-files=no)" ]; then
+    echo "tracked files have uncommitted changes; commit or stash first" >&2
     exit 1
 fi