There are a lot of weird edge cases when using blocks inside of charts,
and we have been telling users to avoid using them for the last six
months. This just removes the documentation about them. It also adds a
warning about why blocks should not be used.

The old link is invalid (404)

Consistently add spacing for '{{ $foo }}'

This adds a detailed document on writing templates in Helm. This is NOT
a best-practices guide, but a thorough introduction to templates in
Helm.