I was surprised to find endash and emdash were not graphic characters in
en_US. I'm not sure if this is correct behavior, a bug in postgres or a
bug in my OS' collation definitions?
For example:
Dash:
area=> select '-' ~ '[[:graph:]]' collate "en_US";
?column?
----------
t
(1 row)
Endash:
area=> select '–' ~ '[[:graph:]]' collate "en_US";
?column?
----------
f
(1 row)
Emdash:
area=> select '—' ~ '[[:graph:]]' collate "en_US";
?column?
----------
f
(1 row)
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