patch TemplateError to remove cause.name in message

[noelforte]

Hi—sorry, quick patch here on the error subclass.

I'd like to revert part of #89 by removing the lines that add (via ErrorName) to the error message. I got the idea to include that from Eleventy, but since Eleventy already includes that as a feature, you get error messages that duplicate the (via ...) text, like so:

[11ty] Error in template src/vento.vto:1:61
[11ty] 
[11ty] <empty file>
[11ty] 
[11ty] (via TemplateError) (via TemplateError)

[11ty] Error in template src/_includes/include.vto:1:1
[11ty] 
[11ty] {{ hello.hello }}
[11ty] 
[11ty] (via TypeError) (via TemplateError)

Is it better to leave the error handling (including cause chains, and the like) up to the implementation, like Eleventy, Lume, and others?

Sorry for the confusion!

[oscarotero]

fair.
Thanks