Allow several Galaxy Markdown directives to be embedded.

[jmchilton]

First step toward implementing #17522.

Reserving a whole block of HTML makes sense for the display of an image or table but for some of the directives it is a bulky thing that really breaks up reports. These are things you'd want to use in legends or headers or footers or in explanatory text.

Here is a before and after demonstrating using the directive to not waste so much space describing the name and type of a dataset in a report.

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The page content demonstrating the embedded Markdown syntax.

I've been planning this syntax for years and many of the directives that don't make a lot of sense on their own - links, names, types, etc... were designed with this in mind some day. The tool reports #19054 & #19067 have a bunch of obvious use cases things you'd want to include (and that would also make sense in a workflow) that would benefit from this work. Two being - the tool name and the tool parameter name or text. Rendering all that dynamically would keep the report and the XML in syntax automatically.

How to test the changes?

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• I've included appropriate automated tests.

License

• I agree to license these and all my past contributions to the core galaxy codebase under the MIT license.