punction

The mark you are talking about is called a caret.

I would call it an accent. The French call it accent circonflexe.

CB

I would call it an accent mark if it was above a letter, but a caret mark if it was between words indicating where something should be inserted (like by a proofreader).

khoff but a caret mark if it was between words indicating where something should be inserted (like by a proofreader).

Which is what I think the poster was intending, at the line of the text rather than above a vowel, even though it is represented as above in the original.