error in documentation

Issue #1741 resolved
Former user created an issue

there is an error in the documentation here. http://www.sqlalchemy.org/docs/reference/dialects/postgresql.html

URLs are of the form postgresql+psycopg2://user@password@host:port/dbname?key=value&key=value....

should read

URLs are of the form postgresql+psycopg2://user:password@host:port/dbname?key=value&key=value....

@ changes to a :