Metadata formatting issue

Hi,

First, thank you for your work on this library, it is very handy and helped me a lot in exporting clear and usable graph for performance and bug tracking.

In my use of Pygal, I rely on the graph metadata to carry additional the information to the values.

However, while this was proven to be really useful, it has its limitations because when adding more information into the metadata, the svg popup box rapidly gets to "large" and exceed the graph size.

Would it be possible to add some metadata configuration options to configure the font size or to allow to split the information into several lines?

Thanks a lot for any help you can provide.

Best,

Laurent.

Start by locating how Pygal metadata is rendered in the SVG popup box and review the existing graph configuration options. The work is done when metadata can be configured with a smaller font size or split across multiple lines without exceeding the graph area.

Written by the indexing model from the issue text.