BUG #10437: Storing Password with a comma and/or colon in it fails use of psql, etc.

The following bug has been logged on the website:

Bug reference:      10437
Logged by:          Michael Heumann
Email address:      michael@mce-business.de
PostgreSQL version: 9.3.3
Operating system:   Windows 7
Description:

I stumbled above the following issue:
When storing a password (which happens in pgpass.conf) one can use pgAdmin,
but not psql or pg_dump.

It will always say: wrong password.
By removing the saved password everything works as expected.
Guess: Passwords including a colon and/or a comma will be interpreted
wrong.