Should SmithJones match Smith-Jones, and LaRussa match La Russa? (both conflict today) #1261

check("Ann SmithJones", "Ann Smith-Jones") and check("Ignazio LaRussa", "Ignazio La Russa") both read family conflict. They are the same surname with a hyphen or a space dropped. jrc-names writes this shape (Ignazio LaRussa, IGNAZIO LARUSSA).

The keys already half-assume a match: a hyphenated family emits its joined form (smithjones;a), so the first pair shares a key no check path uses. The second shares none.

Question: should the check accept a family name that equals the other once spaces and hyphens are removed? As what outcome, in the default or opt-in?

Settling it also settles whether the joined key stays: keys should be derived from what the check compares (simplify pass of #1221).