tweak comment

diff --git a/m4/typeof.m4 b/m4/typeof.m4
index 42cdd3723e10f2454baa35a7802d76d7768a5717..b1596b65a85394fd84cc3d203aab177995009b71 100644 (file)
--- a/m4/typeof.m4
+++ b/m4/typeof.m4
@@ -7,7 +7,7 @@ dnl with or without modifications, as long as this notice is preserved.
 dnl Written by Jim Meyering.
 
 AC_DEFUN([gl_TYPEOF],
-[AC_CACHE_CHECK([for __typeof__], gl_cv_typeof,
+[AC_CACHE_CHECK([for the __typeof__ operator], gl_cv_typeof,
   [AC_COMPILE_IFELSE([AC_LANG_PROGRAM([],
     [[
       int i;