Hello!

> 2014-05-06  Siva Chandra Reddy  <sivachandra@google.com>
>         doc/
>         *  python.texi (Xmethods In Python, XMethod API)
>         (Writing an Xmethod): New nodes.
>         (Python API): New menu entries "Xmethods In Python",
>         "Xmethod API", "Writing an Xmethod".

[...]

> +@defun register_xmethod_matcher(locus, matcher, replace=False)
> +The @code{matcher} is registered with @code{locus}, replacing an
> +existing matcher with the same name as @code{matcher} if
> +@code{replace} is @code{True}.  @code{locus} can be a
> +@code{gdb.Objfile} object (@pxref{Objfiles In Python}), or a
> +@code{gdb.Progspace} object (@pxref{Program Spaces In Python}), or
                                       ^^^^^^^^^^^^^^^^^^^^^^^^

This reference was incorrect and caused the documentation build to fail.
I fixed it by pushing the attached commit.

gdb/doc/ChangeLog:

        * python.texi (Xmethod API): Fix reference to "Progspaces In
        Python".

Tested by rebuilding all documentation formats.

-- 
Joel