It doesn't appear to be possible to view the Markdown source of a wiki page without actually having edit privileges for the page.
It would be useful to be able to view the source like you can here: http://daringfireball.net/projects/markdown/syntax.text
This on the other hand, doesn't work: https://sourceforge.net/p/forge/community-docs/markdown_syntax.text
In particular, this would be useful for our community docs team, as they could then view the source for the official docs (and copy/paste) to serve as a starting point for their community doc.
We don't need to use ".text" as the end of URL, perhaps use /edit or /source
Checking into this again, it looks like you can see the source with a little workaround. If you go to the post history, and compare the same revision, you can see the source. That's a bit unintuitive and cumbersome though.
There is a /raw URL currently but that just dumps some internal data and isn't very useful. Using the REST API is another workaround currently available. Example: http://sourceforge.net/rest/p/allura/wiki/Allura%20Wiki