fix print preamble

src/plan/main.py

@@ -12,7 +12,6 @@ def get_template(template_name: str = "plan.html", plan_path: Path | None = None
     templates = Environment(
         loader=PackageLoader("plan"), autoescape=select_autoescape()
     )
-    breakpoint()
     template = templates.get_template(template_name)
     today = datetime.today().strftime("%Y-%m-%d")
     return template.render(today=today, plan_path=plan_path)
@@ -36,11 +35,12 @@ def print_plan(plan_path: Path):
     uses pandoc and lp shell tools.
     """
     preamble = """
-        ---
-        documentclass: extarticle
-        fontsize: 20pt
-        ---
-    """
+---
+documentclass: extarticle
+fontsize: 20pt
+---
+
+"""
     preamble = subprocess.Popen(["echo", "-n", preamble], stdout=subprocess.PIPE)
     cat = subprocess.Popen(
         ["cat", "-", str(plan_path)],