puppetlabs/puppet-docs — pull request #121 by mrzarquon (2012-12-13 22:10:23+00:00)
Title: (#13968) Improves list of illegal char for install

Adds ampersand to the list

Adds note to follow this guideline for all passwords, not just the
console password, reccomends alphanumeric.

Previously only mentions the console password, and the user can
customize the mysql password as well.