Use EM dash (—, unicode x2014) instead of double hyphen (--) … #1019
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…to offset parenthetical text and normalize spacing around it
The scope is definitions + examples.
The contexts have been reviewed but no undue use of parenthetical text was noted — the semantics seems good and I'll stick with Princeton's work.
So the substitution is 'automatic', but for the spaces around '--' which have been normalized (in most cases, but not all, there was no space).
This PR follows Merriam Webster's guidelines.
This change is easily reversible for legacy work that uses '--' and does not complicate processing.