pgsql: There is no good reason for the CREATE TABLE LIKE INCLUDING

Log Message:
-----------
There is no good reason for the CREATE TABLE LIKE INCLUDING COMMENTS code to
have hard-wired knowledge of the rules for naming index columns.  It can
just look at the actual names in the source index, instead.  Do some minor
formatting cleanup too.

Modified Files:
--------------
    pgsql/src/backend/parser:
        parse_utilcmd.c (r2.32 -> r2.33)
        (http://anoncvs.postgresql.org/cvsweb.cgi/pgsql/src/backend/parser/parse_utilcmd.c?r1=2.32&r2=2.33)