Re: dired-do-rename on "." and ".."

[Luc Teirlinck]

I believe we would also need to change the documentation string of
dired-get-filename.

Currently it is:

  "In Dired, return name of file mentioned on this line.
Value returned normally includes the directory name.
Optional arg LOCALP with value `no-dir' means don't include directory
  name in result.  A value of `verbatim' means to return the name
exactly as
  it occurs in the buffer, and a value of t means construct name
relative to
  `default-directory', which still may contain slashes if in a
subdirectory.
Optional arg NO-ERROR-IF-NOT-FILEP means return nil if no filename on
  this line, otherwise an error occurs."

We could change:

Optional arg NO-ERROR-IF-NOT-FILEP means return nil if no filename on
  this line, otherwise an error occurs.

To:

Optional arg NO-ERROR-IF-NOT-FILEP means treat . and .. as regular
filenames and return nil if no filename on this line.  Otherwise, an
error occurs in these cases.

Sincerely,

Luc.