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Commit d8594d123 updated the list of non-spacing codepoints used for calculating display width, but in doing so inadvertently removed some, since the script used for that commit only considered combining characters. For complete coverage for zero-width characters, include codepoints in the category Cf (Format). To reflect the wider purpose, also rename files and update comments that referred specifically to combining characters. Some of these ranges have been missing since v12, but due to lack of field complaints it was determined not important enough to justify adding special-case logic the backbranches. Kyotaro Horiguchi Report by Pavel Stehule Discussion: https://www.postgresql.org/message-id/flat/CAFj8pRBE8yvpQ0FSkPCoe0Ny1jAAsAQ6j3qMgVwWvkqAoaaNmQ%40mail.gmail.com
PostgreSQL Database Management System ===================================== This directory contains the source code distribution of the PostgreSQL database management system. PostgreSQL is an advanced object-relational database management system that supports an extended subset of the SQL standard, including transactions, foreign keys, subqueries, triggers, user-defined types and functions. This distribution also contains C language bindings. PostgreSQL has many language interfaces, many of which are listed here: https://www.postgresql.org/download/ See the file INSTALL for instructions on how to build and install PostgreSQL. That file also lists supported operating systems and hardware platforms and contains information regarding any other software packages that are required to build or run the PostgreSQL system. Copyright and license information can be found in the file COPYRIGHT. A comprehensive documentation set is included in this distribution; it can be read as described in the installation instructions. The latest version of this software may be obtained at https://www.postgresql.org/download/. For more information look at our web site located at https://www.postgresql.org/.