bug#52166: Dired doesn't handle filenames with newlines

[Tor Kringeland]

Create a file named `
file.txt` in `dired' (that is, with a newline included).  It's possible
to mark this file, but when I try to delete it, `dired' complains that
there is "No file on this line".

Moreover, only "file.txt" is displayed on the next line, with no
indication that the filename starts with a newline.  This makes it easy
to miss it at a glance.  It could be helpful to have an option of the
filename instead being displayed like "^Jfile.txt" instead.

I'm using a recent build of Emacs 29 (from 24 November) on macOS.