em dash、エムダッシュ

Producing the em dash

"Many word processors will automatically insert an em dash when you type a pair of hyphens. Otherwise, look for an “insert symbol” command," The Punctuation Guide

 

エムダッシュ：2014, alt, x

エンダッシュ：2013, alt, x

エムダッシュをカッコとして使う場合、両端にスペース入れる。

I will give you the book — the one I told you about yesterday — tomorrow.