pgsql: Adjust cycle detection examples and tests

Adjust cycle detection examples and tests

Adjust the existing cycle detection example and test queries to put
the cycle column before the path column.  This is mainly because the
SQL-standard CYCLE clause puts them in that order, and so if we added
that feature that would make the sequence of examples more consistent
and easier to follow.

Discussion: https://www.postgresql.org/message-id/c5603982-0088-7f14-0caa-fdcd0c837b57@2ndquadrant.com

Branch
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master

Details
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https://git.postgresql.org/pg/commitdiff/3fb676504da9c019540c7384423c7e3d7d394110

Modified Files
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doc/src/sgml/queries.sgml          |  26 ++++----
src/test/regress/expected/with.out | 124 ++++++++++++++++++-------------------
src/test/regress/sql/with.sql      |  16 ++---
3 files changed, 83 insertions(+), 83 deletions(-)