doc: add '[' to the info index

* doc/coreutils.texi (test invocation): Add '[' to the index.

diff --git a/doc/coreutils.texi b/doc/coreutils.texi
index 9015a3717c3c5a0186172534b3833979661b8fbe..0ef9a098f72b4faf9f3f8a7d1e978d5a4cd8a008 100644 (file)
--- a/doc/coreutils.texi
+++ b/doc/coreutils.texi
@@ -13588,6 +13588,7 @@ be used as a dummy shell for the purpose of disabling accounts.
 @section @command{test}: Check file types and compare values
 
 @pindex test
+@pindex [
 @cindex check file types
 @cindex compare values
 @cindex expression evaluation