doc/statistics.texi: Add comma after @xref.

Apparently older versions of makeinfo insist on this.

Reported-by: Harry Thijssen
Fix-by: Ben Pfaff

diff --git a/doc/statistics.texi b/doc/statistics.texi
index ef31166fd1d8882a09f98ac553138cb12b31653f..c46189bd0709394fe2552ee9783915126c9442a3 100644 (file)
--- a/doc/statistics.texi
+++ b/doc/statistics.texi
@@ -834,7 +834,7 @@ individual data cases.  Typically the matrix file will have been generated by
 If specified, @subcmd{MATRIX IN} must be followed by @samp{COV} or @samp{CORR},
 then by @samp{=} and @var{file_spec} all in parentheses.
 @var{file_spec} may either be an asterisk, which indicates the currently loaded
-dataset, or it may be a filename to be loaded. @xref{MATRIX DATA} for the expected
+dataset, or it may be a filename to be loaded. @xref{MATRIX DATA}, for the expected
 format of the file.
 
 The @subcmd{/EXTRACTION} subcommand is used to specify the way in which factors (components) are extracted from the data.