#2369: clarify that copyfile() doesn't take a target directory.

Doc/library/shutil.rst

@@ -28,15 +28,6 @@ copying and removal. For operations on individual files, see also the
    are not copied.
 
 
-.. function:: copyfile(src, dst)
-
-   Copy the contents (no metadata) of the file named *src* to a file named *dst*.
-   The destination location must be writable; otherwise,  an :exc:`IOError` exception
-   will be raised. If *dst* already exists, it will be replaced.   Special files
-   such as character or block devices and pipes cannot be copied with this
-   function.  *src* and *dst* are path names given as strings.
-
-
 .. function:: copyfileobj(fsrc, fdst[, length])
 
    Copy the contents of the file-like object *fsrc* to the file-like object *fdst*.
@@ -48,6 +39,17 @@ copying and removal. For operations on individual files, see also the
    be copied.
 
 
+.. function:: copyfile(src, dst)
+
+   Copy the contents (no metadata) of the file named *src* to a file named *dst*.
+   *dst* must be the complete target file name; look at :func:`copy` for a copy that
+   accepts a target directory path.
+   The destination location must be writable; otherwise,  an :exc:`IOError` exception
+   will be raised. If *dst* already exists, it will be replaced.   Special files
+   such as character or block devices and pipes cannot be copied with this
+   function.  *src* and *dst* are path names given as strings.
+
+
 .. function:: copymode(src, dst)
 
    Copy the permission bits from *src* to *dst*.  The file contents, owner, and