The double hyphen (＝, ゠, or ⸗) is a punctuation mark that consists of two parallel hyphens. It is not to be confused with two consecutive hyphens (--), which usually represents an em dash (—) or en dash (–). In order to avoid its being confused with the equals sign (=), the double hyphen is often sheared slightly.
Famous quotes containing the word double:
“Go; and if that word have not quite killed thee,
Ease me with death by bidding me got too.
Oh, if it have, let my word work on me,
And a just office on a murderer do.
Except it be too late to kill me so,
Being double dead: going, and bidding go.”
—John Donne (1572–1631)