You can easily pass an svg through a partial in a template.
BUT passing it in content files is more tricky. It really depends on what you want to do.
Do you want to have the svg inline or pass it as an image?
If you want the first option then the only way that I can think of is to pass it through a frontmatter parameter, but that will be kind of ugly.
e.g. svg = "svg source here"
And then in your single.html call it like this {{ with Params.svg }}{{ . }}{{ end }} and wrap it in whatever html you need.
If you want the second option (passing the svg as an img) then make an svg shortcode and reference the different svg urls in your content files.
Look up partials, shortcodes and frontmatter parameters in the docs. And choose that which suits your needs.
