pgsql: Use '  ' escapes for leading spaces in table values, for use

Log Message:
-----------
Use ' ' escapes for leading spaces in table values, for use in
EXPLAIN output.

Jean-Paul Argudo

Modified Files:
--------------
pgsql/src/bin/psql:
print.c (r1.59 -> r1.60)
(http://developer.postgresql.org/cvsweb.cgi/pgsql/src/bin/psql/print.c.diff?r1=1.59&r2=1.60)