#!/usr/bin/env python3
"""Ganti em dash di berkas markdown dengan tanda baca yang lebih wajar (aturan humanizer)."""
import sys

P = sys.argv[1]
t = open(P, encoding="utf-8").read()
n = t.count("—")
t = t.replace(" — ", ": ").replace("—", ":")
open(P, "w", encoding="utf-8").write(t)
print(f"{P}: {n} em dash diganti")