Auto-transforming em dash in dialogue? [closed]

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AutoCorrect needs a following space. Also see Help on Replace dash "Text will be replaced after you type a trailing white space (space, tab, or return). In the following table, the A and B represent text consisting of letters A to Z or digits 0 to 9."

Try AutoHotKey

Record a Find and Replace macro which searches for them and changes them as required.

On LibO there is a special kind of autocorrect that does not need space surrounding it: the ones that uses colons. If you type

:---:

as soon as the second colon is introduced the three dashes will be replaced by an em-dash (the sequence :-: inserts a "minus" sign while :--: inserts an en-dash)

Note: if you prefer a shorter shortcut you can define a new one on autocorrect options, something like :_: will work fine.