is this valid - Mailing list pgsql-general

From Dennis Gearon
Subject is this valid
Date
Msg-id 4095C21B.2030407@fireserve.net
Whole thread Raw
Responses Re: is this valid  (Tom Lane <tgl@sss.pgh.pa.us>)
List pgsql-general
If found this twice in the 7.3.2 User Manual:

ALTER TABLE products ADD COLUMN description text CHECK (description <> ”);

Shouldn't there be TWO parenthesis marks?

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