@pxref does not produce "see" in info reader

[Benno Schulenberg]

Hi,

In the nano.texi file we use something like this:

    "There are also some commands to define syntax highlighting and to
    rebind keys --- @pxref{Syntax Highlighting} and @ref{Rebinding Keys}.

When transformed to HTML or PDF this produces a "see" after the mdash.
Good.  But when transformed to an Info document, and using the option
'hide-note-references=On' in the .infokey file for the stand-alone info
reader, the "*note" gets transformed to nothing -- the whole "see" is
absent.

(The "see" does appear when I put the @pxref between parentheses, but
I don't want parentheses there.)

From the last paragraphs of 'info texinfo cross @px' I get the impression
that the "see" should be there, but for me it is absent from the example.

Noticed with 6.3.  Still present in 6.4.90.

Benno