doc: avoid makeinfo warning

Commit v8.26-38-g99deaff introduced this warning:

    MAKEINFO doc/coreutils.info
  ./doc/coreutils.texi:10268: \
    warning: `.' or `,' must follow @xref, not `@'.

* doc/coreutils.texi (readlink invocation): Add '.' after @xref macro.

diff --git a/doc/coreutils.texi b/doc/coreutils.texi
index 2dbfccecc8f1a9ba60996979832046f77764a889..2356a3f8a054ee899df73f7b09e4b7c6956f8b01 100644 (file)
--- a/doc/coreutils.texi
+++ b/doc/coreutils.texi
@@ -10265,7 +10265,7 @@ of a symbolic link, it produces no output and exits with a nonzero exit code.
 @command{readlink} outputs the absolute name of the given files which contain
 no @file{.}, @file{..} components nor any repeated separators
 (@file{/}) or symbolic links.  Note the @command{realpath} command is the
-preferred command to use for canonicalization.  @xref{realpath invocation}
+preferred command to use for canonicalization.  @xref{realpath invocation}.
 
 @end table