The following bug has been logged on the website:
Bug reference: 7490
Logged by: mauro
Email address: m.russo@uniplan.it
PostgreSQL version: 9.1.4
Operating system: no matter
Description:=20=20=20=20=20=20=20=20
Dears,
in
http://www.postgresql.org/docs/9.1/static/functions-string.html
the example
overlay('Txxxxas' placing 'hom' from 2 for 4)
should be corrected : 'homa' instead of 'hom'.