Enrico Scholz writes:
The messages seems to be right because of "A period or comma
*must*
follow the closing brace of an `@xref'. It is required to terminate
the cross reference." [texinfo.info, node "Reference syntax"]. So I'm
wondering nobody else has detected this error.
Nobody has detected it probably because the rule was unenforced.
makeinfo has a grim history (with me at least) of complaining
about stuff that nobody should care about. What difference does
it make if a period or a comma comes after the closing brace?
But we should definitely fix the manuals so that makeinfo shuts
up, because there will be no peace in the valley until we do.