doc: fix "Up" field of realpath usage examples

Older versions of 'makeinfo' choke on a missing reference:

  ./doc/coreutils.texi:14177: `Realpath usage examples' has no Up field\
  (perhaps incorrect sectioning?).
  makeinfo: Removing output file `doc/coreutils.info' due to errors; \
  use --force to preserve.

* doc/coreutils.texi (realpath invocation): Add a menu referencing
the usage examples - introduced in v8.27-91-g7449f0d.

diff --git a/doc/coreutils.texi b/doc/coreutils.texi
index 70e2b76c5d35ca9f1a6e96038fbbce1ea62706d8..d374b4abcd6610858c57343267eba4ff62ec3141 100644 (file)
--- a/doc/coreutils.texi
+++ b/doc/coreutils.texi
@@ -14175,6 +14175,10 @@ Exit status:
 1 otherwise.
 @end display
 
+@menu
+* Realpath usage examples::              Realpath usage examples.
+@end menu
+
 
 @node Realpath usage examples
 @subsection Realpath usage examples