pgsql: Make some sentences consistent with similar ones.

Log Message:
-----------
Make some sentences consistent with similar ones.

Euler Taveira de Oliveira

Modified Files:
--------------
    pgsql/src/backend/access/transam:
        twophase.c (r1.22 -> r1.23)
        (http://developer.postgresql.org/cvsweb.cgi/pgsql/src/backend/access/transam/twophase.c.diff?r1=1.22&r2=1.23)
    pgsql/src/backend/commands:
        aggregatecmds.c (r1.39 -> r1.40)
        (http://developer.postgresql.org/cvsweb.cgi/pgsql/src/backend/commands/aggregatecmds.c.diff?r1=1.39&r2=1.40)
        functioncmds.c (r1.77 -> r1.78)
        (http://developer.postgresql.org/cvsweb.cgi/pgsql/src/backend/commands/functioncmds.c.diff?r1=1.77&r2=1.78)
        operatorcmds.c (r1.31 -> r1.32)
        (http://developer.postgresql.org/cvsweb.cgi/pgsql/src/backend/commands/operatorcmds.c.diff?r1=1.31&r2=1.32)
        proclang.c (r1.67 -> r1.68)
        (http://developer.postgresql.org/cvsweb.cgi/pgsql/src/backend/commands/proclang.c.diff?r1=1.67&r2=1.68)
        tablespace.c (r1.37 -> r1.38)
        (http://developer.postgresql.org/cvsweb.cgi/pgsql/src/backend/commands/tablespace.c.diff?r1=1.37&r2=1.38)
        trigger.c (r1.207 -> r1.208)
        (http://developer.postgresql.org/cvsweb.cgi/pgsql/src/backend/commands/trigger.c.diff?r1=1.207&r2=1.208)
    pgsql/src/backend/libpq:
        auth.c (r1.142 -> r1.143)
        (http://developer.postgresql.org/cvsweb.cgi/pgsql/src/backend/libpq/auth.c.diff?r1=1.142&r2=1.143)
    pgsql/src/backend/rewrite:
        rewriteRemove.c (r1.66 -> r1.67)
        (http://developer.postgresql.org/cvsweb.cgi/pgsql/src/backend/rewrite/rewriteRemove.c.diff?r1=1.66&r2=1.67)