What is the typographically correct way to typeset a missing or left out word in a sentence?
For example, "You should brush your ——— every morning!". Where "teeth" would be the word intentionally left out.
The Punctuation Guide talks about this:
When an entire word is missing, either two or three em dashes can be used. Whichever length you choose, use it consistently throughout your document. Surrounding punctuation should be placed as usual.
However, I am not sure if this is the typographically correct way, or was just born out of necessity. Alternatives I can think of are underscores or ellipses.