wikiheaders: links are misgenerated in manpage output.

[icculus]

The last paragraph of the SDL_StepUTF8 manpage's remarks currently looks like this:

       Several  things  can  generate  invalid  UTF-8   sequences,   including   overlong   encodings,   the   use   of   UTF-16   surrogate   values,   and   truncated   data.URL
       https://www.ietf.org/rfc/rfc3629.txt "char46] Please refer to [RFC3629"
        for details.

Probably just need a newline before a .URL section or something.

[icculus]

Tossing this into 3.4.12 so I don't forget to fix this in the short term, but it's probably not going to make it for 3.4.10.

[icculus]

This looks like links in general are broken when converted from Markdown format. Here's SDL_AppResult.3type:

      See Main callbacks in SDL3 ⟨https://wiki.www:lenstrwww:splitstr:nwww:splitstr:r[char46]libsdl.www:lenstrwww:splitstr:nwww:splitstr:r[char46]org/SDL3/
       README-main-functions#main-callbacks-in-sdl3⟩
        for complete details.