Обсуждение: pgsql: Fix some typos in comments.

Log Message:
-----------
Fix some typos in comments.

Modified Files:
--------------
    pgsql/src/backend/access/gin:
        ginbtree.c (r1.5 -> r1.6)
        (http://developer.postgresql.org/cvsweb.cgi/pgsql/src/backend/access/gin/ginbtree.c.diff?r1=1.5&r2=1.6)
        gindatapage.c (r1.4 -> r1.5)
        (http://developer.postgresql.org/cvsweb.cgi/pgsql/src/backend/access/gin/gindatapage.c.diff?r1=1.4&r2=1.5)
        ginentrypage.c (r1.4 -> r1.5)
        (http://developer.postgresql.org/cvsweb.cgi/pgsql/src/backend/access/gin/ginentrypage.c.diff?r1=1.4&r2=1.5)
        ginget.c (r1.3 -> r1.4)
        (http://developer.postgresql.org/cvsweb.cgi/pgsql/src/backend/access/gin/ginget.c.diff?r1=1.3&r2=1.4)
        ginvacuum.c (r1.7 -> r1.8)
        (http://developer.postgresql.org/cvsweb.cgi/pgsql/src/backend/access/gin/ginvacuum.c.diff?r1=1.7&r2=1.8)
    pgsql/src/backend/access/gist:
        gist.c (r1.143 -> r1.144)
        (http://developer.postgresql.org/cvsweb.cgi/pgsql/src/backend/access/gist/gist.c.diff?r1=1.143&r2=1.144)
        gistget.c (r1.61 -> r1.62)
        (http://developer.postgresql.org/cvsweb.cgi/pgsql/src/backend/access/gist/gistget.c.diff?r1=1.61&r2=1.62)
    pgsql/src/backend/commands:
        comment.c (r1.92 -> r1.93)
        (http://developer.postgresql.org/cvsweb.cgi/pgsql/src/backend/commands/comment.c.diff?r1=1.92&r2=1.93)