Is there a way to include plain text in a doxygen file
Hello Wold
----------
@include helloworld.txt
without it ending up in a fragment like:
I wanted it to end up like the other text I write in a .markdown file:
I'm sorry to say I don't think there's an easy way to do this as of May 2016 - what you really need is a mdinclude
command to match htmlinclude.
The problem is that Markdown is processed as a pre-processing step and the output from that then run through the normal Doxygen processing detecting generated HTML and special commands.
So, unless you want to make a submission to Doxygen, the only way I can think of is to do your own pre-processing for this particular include.
You could do that in a build step where you use some Unix commands or a script to merge in a file at the include stage.
If you wanted this driven by Doxygen you could use a custom file extension and write your own filter, as described in this SO answer