comint-delchar-or-maybe-eof nicety

[jidanni]

$ emacs -Q
z z z z z z z z z <return> C-p C-k C-k <escape> x s
h e l l <return> c a t <return> C-y C-d C-f
It beeps on both C-d and C-f, meaning that

  C-d runs the command comint-delchar-or-maybe-eof
  Sends an EOF only if point is at the end of the buffer

is wrong, unless it has something to do with

  and there is no input.

Anyway, I love yanking several lines into the *shell* buffer, but then
often C-d, C-c C-d, or even C-q C-d send one too many C-d's. OK, never
mind. emacs-version "22.1.1".