Use proper quoting so brackets appear in the test program.

diff --git a/m4/regex.m4 b/m4/regex.m4
index 08438f4b9e25a64f85c974a482b77106250b72ba..66b39c3aea339fd672c3477d18aae664e32b1aa9 100644 (file)
--- a/m4/regex.m4
+++ b/m4/regex.m4
@@ -1,4 +1,4 @@
-#serial 9
+#serial 10
 
 dnl Initially derived from code in GNU grep.
 dnl Mostly written by Jim Meyering.
@@ -45,7 +45,7 @@ AC_DEFUN(jm_INCLUDED_REGEX,
 
            /* The following example is derived from a problem report
                against gawk from Jorge Stolfi <stolfi@ic.unicamp.br>.  */
-           s = re_compile_pattern ("[anù]*n", 7, &regex);
+           s = re_compile_pattern ("[[anù]]*n", 7, &regex);
            if (s)
              exit (1);