[PATCH] doc: fix another bad @xref

[Eric Blake]

Obviously, I didn't fully test commit f35498d.

* doc/autoconf.texi (Limitations of Builtins): Add a comma.

Signed-off-by: Eric Blake <address@hidden>
---
 doc/autoconf.texi |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)

diff --git a/doc/autoconf.texi b/doc/autoconf.texi
index 34ca213..393e38f 100644
--- a/doc/autoconf.texi
+++ b/doc/autoconf.texi
@@ -17874,7 +17874,7 @@ Limitations of Builtins
 @samp{-}. With Solaris @command{ksh}, it is possible to use @code{print
 -r --} for this role instead.

address@hidden, , Limitations of Shell Builtins} for a discussion of
address@hidden, , Limitations of Shell Builtins}, for a discussion of
 portable alternatives to both @command{printf} and @command{echo}.


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1.7.7.6