Add hints into logs

[thibaudcolas]

In GitLab by @m1kola on Oct 12, 2018, 16:00

Currently are writing into log if the pattern library can't find stub data for a template tag. See this:

logger.warning(
    'No stub data defined for the "%s" tag in the "%s" template',
    tag_name, current_template_name
)

Instead of this, we can write a hint like:

No stub data defined for the "%(tag_name)s" tag in the "%(current_template_name)s" template.
To override the template add the following into 
your yaml file:
tags:
  %(tag_name)s:
    %(tag_arguments)s:
      raw:
        some_attribute: some data

[thibaudcolas]

I don’t think this is as relevant since #141, as we now have 3 different ways to add stub data for a template tag. Closing.