Reword recent error messages: "should" -> "must"

Álvaro Herrera <alvherre@alvh.no-ip.org>

Commit: dbc3499a0bcb544d30ec4f6fe576b28ce0a7951f
Author: Álvaro Herrera <alvherre@alvh.no-ip.org>
Date: 2025-01-21T14:24:49Z
Releases: 17.3
Reword recent error messages: "should" -> "must"

Most were introduced in the 17 timeframe.  The ones in wparser_def.c are
very old.

I also changed "JSON path expression for column \"%s\" should return
single item without wrapper" to "JSON path expression for column \"%s\"
must return single item when no wrapper is requested" to avoid
ambiguity.

Backpatch to 17.

Crickets: https://postgr.es/m/202501131819.26ors7oouafu@alvherre.pgsql

Files