doc: Better example for custom ICU rules
Use a more practical example, and also add some explanation.
Reported-by: Jeff Davis <pgsql@j-davis.com>
Branch
------
master
Details
-------
https://git.postgresql.org/pg/commitdiff/cd427859745af4574d75e37ec7d427ccd2b8b24a
Modified Files
--------------
doc/src/sgml/ref/create_collation.sgml | 12 +++++++++---
1 file changed, 9 insertions(+), 3 deletions(-)