を使い文字コードをutf-8 or utf-16のsignature付きものを指定してから保存する 指定できるのは以下のもの utf-16be-with-signature utf-16be-with-signature-dos utf-16be-with-signature-mac utf-16be-with-signature-unix utf-16le-with-signature utf-16le-with-signature-dos utf-16le-with-signature-mac utf-16le-with-signature-unix utf-8-with-signature utf-8-with-signature-dos utf-8-with-signature-mac utf-8-with-signature-unix 例:
![emacs で文字コードをUnicode(UTF-8 or UTF-16)のBOM付きにする - Qiita](https://cdn-ak-scissors.b.st-hatena.com/image/square/e38b3239b1576d8b9299404e753f161b2184b95e/height=288;version=1;width=512/https%3A%2F%2Fqiita-user-contents.imgix.net%2Fhttps%253A%252F%252Fcdn.qiita.com%252Fassets%252Fpublic%252Farticle-ogp-background-9f5428127621718a910c8b63951390ad.png%3Fixlib%3Drb-4.0.0%26w%3D1200%26mark64%3DaHR0cHM6Ly9xaWl0YS11c2VyLWNvbnRlbnRzLmltZ2l4Lm5ldC9-dGV4dD9peGxpYj1yYi00LjAuMCZ3PTkxNiZoPTMzNiZ0eHQ9ZW1hY3MlMjAlRTMlODElQTclRTYlOTYlODclRTUlQUQlOTclRTMlODIlQjMlRTMlODMlQkMlRTMlODMlODklRTMlODIlOTJVbmljb2RlJTI4VVRGLTglMjBvciUyMFVURi0xNiUyOSVFMyU4MSVBRUJPTSVFNCVCQiU5OCVFMyU4MSU4RCVFMyU4MSVBQiVFMyU4MSU5OSVFMyU4MiU4QiZ0eHQtY29sb3I9JTIzMjEyMTIxJnR4dC1mb250PUhpcmFnaW5vJTIwU2FucyUyMFc2JnR4dC1zaXplPTU2JnR4dC1jbGlwPWVsbGlwc2lzJnR4dC1hbGlnbj1sZWZ0JTJDdG9wJnM9NDRhZmRhYTgxNmNmNjYyYzQ4Y2RmMWIyNDkxZDMzODk%26mark-x%3D142%26mark-y%3D112%26blend64%3DaHR0cHM6Ly9xaWl0YS11c2VyLWNvbnRlbnRzLmltZ2l4Lm5ldC9-dGV4dD9peGxpYj1yYi00LjAuMCZ3PTYxNiZ0eHQ9JTQwamp6YWsmdHh0LWNvbG9yPSUyMzIxMjEyMSZ0eHQtZm9udD1IaXJhZ2lubyUyMFNhbnMlMjBXNiZ0eHQtc2l6ZT0zNiZ0eHQtYWxpZ249bGVmdCUyQ3RvcCZzPTc1NWRiOTIwODIwNzlhM2RiZmQ1Mjc0MDJhNWExYWEy%26blend-x%3D142%26blend-y%3D491%26blend-mode%3Dnormal%26s%3D3b2641a968e734286fddb3b6aef1220a)