To create an empty file (and perhaps also one or more parent
directories) and then immediately visit the file (e.g., to yank some
copied text into it), you currently have to type `M-x make-empty-file',
enter the file name (possibly with parent directories), and then type
`C-x C-f M-p'.  As a more convenient alternative to invoking two
commands, I propose that invoking `make-empty-file' with a prefix
argument should create and visit the empty file.  Here is a simple
backward compatible patch to do this: