`rich --print` always adds an extra newline

[schwa]

I'd expect rich --print to always preserve the lines of the input file. However rich --print always seems to add a newline. It would be great if no newlines were added during rich --print. I'd also recommend the addition of a -n flag that works like the same flag in echo to remove automatic line endings.

> echo -n | wc -l
       0
> echo | wc -l
       1
> echo -n | rich - --print | wc -l
       1
> echo | rich - --print | wc -l
       2
> echo -n | rich - --print --soft | wc -l
       1
> echo | rich - --print --soft | wc -l
       2