pgsql: Improve psql's tabular display of wrapped-around data by

Log Message:
-----------
Improve psql's tabular display of wrapped-around data by inserting markers
in the formerly-always-blank columns just to left and right of the data.
Different marking is used for a line break caused by a newline in the data
than for a straight wraparound.  A newline break is signaled by a "+" in the
right margin column in ASCII mode, or a carriage return arrow in UNICODE mode.
Wraparound is signaled by a dot in the right margin as well as the following
left margin in ASCII mode, or an ellipsis symbol in the same places in UNICODE
mode.  "\pset linestyle old-ascii" is added to make the previous behavior
available if anyone really wants it.

In passing, this commit also cleans up a few regression test files that
had unintended spacing differences from the current actual output.

Roger Leigh, reviewed by Gabrielle Roth and other members of PDXPUG.

Modified Files:
--------------
    pgsql/contrib/dblink/expected:
        dblink.out (r1.26 -> r1.27)
        (http://anoncvs.postgresql.org/cvsweb.cgi/pgsql/contrib/dblink/expected/dblink.out?r1=1.26&r2=1.27)
    pgsql/contrib/pgcrypto/expected:
        crypt-blowfish.out (r1.3 -> r1.4)
        (http://anoncvs.postgresql.org/cvsweb.cgi/pgsql/contrib/pgcrypto/expected/crypt-blowfish.out?r1=1.3&r2=1.4)
        pgp-armor.out (r1.4 -> r1.5)
        (http://anoncvs.postgresql.org/cvsweb.cgi/pgsql/contrib/pgcrypto/expected/pgp-armor.out?r1=1.4&r2=1.5)
        pgp-decrypt.out (r1.1 -> r1.2)
        (http://anoncvs.postgresql.org/cvsweb.cgi/pgsql/contrib/pgcrypto/expected/pgp-decrypt.out?r1=1.1&r2=1.2)
    pgsql/contrib/tsearch2/expected:
        tsearch2.out (r1.28 -> r1.29)
        (http://anoncvs.postgresql.org/cvsweb.cgi/pgsql/contrib/tsearch2/expected/tsearch2.out?r1=1.28&r2=1.29)
        tsearch2_1.out (r1.1 -> r1.2)
        (http://anoncvs.postgresql.org/cvsweb.cgi/pgsql/contrib/tsearch2/expected/tsearch2_1.out?r1=1.1&r2=1.2)
    pgsql/doc/src/sgml/ref:
        psql-ref.sgml (r1.232 -> r1.233)
        (http://anoncvs.postgresql.org/cvsweb.cgi/pgsql/doc/src/sgml/ref/psql-ref.sgml?r1=1.232&r2=1.233)
    pgsql/src/bin/psql:
        command.c (r1.210 -> r1.211)
        (http://anoncvs.postgresql.org/cvsweb.cgi/pgsql/src/bin/psql/command.c?r1=1.210&r2=1.211)
        print.c (r1.117 -> r1.118)
        (http://anoncvs.postgresql.org/cvsweb.cgi/pgsql/src/bin/psql/print.c?r1=1.117&r2=1.118)
        print.h (r1.41 -> r1.42)
        (http://anoncvs.postgresql.org/cvsweb.cgi/pgsql/src/bin/psql/print.h?r1=1.41&r2=1.42)
    pgsql/src/test/regress/expected:
        create_cast.out (r1.1 -> r1.2)
        (http://anoncvs.postgresql.org/cvsweb.cgi/pgsql/src/test/regress/expected/create_cast.out?r1=1.1&r2=1.2)
        dependency.out (r1.9 -> r1.10)
        (http://anoncvs.postgresql.org/cvsweb.cgi/pgsql/src/test/regress/expected/dependency.out?r1=1.9&r2=1.10)
        foreign_data.out (r1.10 -> r1.11)
        (http://anoncvs.postgresql.org/cvsweb.cgi/pgsql/src/test/regress/expected/foreign_data.out?r1=1.10&r2=1.11)
        foreign_key.out (r1.48 -> r1.49)
        (http://anoncvs.postgresql.org/cvsweb.cgi/pgsql/src/test/regress/expected/foreign_key.out?r1=1.48&r2=1.49)
        guc.out (r1.8 -> r1.9)
        (http://anoncvs.postgresql.org/cvsweb.cgi/pgsql/src/test/regress/expected/guc.out?r1=1.8&r2=1.9)
        prepare.out (r1.19 -> r1.20)
        (http://anoncvs.postgresql.org/cvsweb.cgi/pgsql/src/test/regress/expected/prepare.out?r1=1.19&r2=1.20)
        triggers.out (r1.29 -> r1.30)
        (http://anoncvs.postgresql.org/cvsweb.cgi/pgsql/src/test/regress/expected/triggers.out?r1=1.29&r2=1.30)
        tsearch.out (r1.16 -> r1.17)
        (http://anoncvs.postgresql.org/cvsweb.cgi/pgsql/src/test/regress/expected/tsearch.out?r1=1.16&r2=1.17)
        with.out (r1.12 -> r1.13)
        (http://anoncvs.postgresql.org/cvsweb.cgi/pgsql/src/test/regress/expected/with.out?r1=1.12&r2=1.13)