tests/mktests.sh portability problem with Solaris 8 "sed"

[Paul Eggert]

tests/mktests.sh runs into a portability problem on Solaris 8, since
Solaris 8 'sed' has a silly line length limit.  I know that
tests/mktests.sh is supposed to assume "reasonable" tools, but in this
case the workaround simplifies the code so I don't think that anyone
will object.

2002-09-01  Paul Eggert  <address@hidden>

        * tests/mktests.sh (ac_exclude_egrep, au_exclude_egrep): Use
        ordinary shell concatenation rather than echo+tr+sed command that
        runs afoul of a long-line-related sed bug in Solaris 8.

Index: tests/mktests.sh
===================================================================
RCS file: /cvsroot/autoconf/autoconf/tests/mktests.sh,v
retrieving revision 1.28
retrieving revision 1.29
diff -p -u -r1.28 -r1.29
--- tests/mktests.sh    27 Jun 2002 07:51:16 -0000      1.28
+++ tests/mktests.sh    2 Sep 2002 06:44:27 -0000       1.29
@@ -155,10 +155,7 @@ _AC_'
 # ac_exclude_egrep
 # ----------------
 # Build a single extended regular expression out of filter_macros_list.
-# Sed is used to get rid of the trailing `|' coming from the trailing
-# `\n' from `echo'.
-ac_exclude_egrep=`echo "$exclude_list$ac_exclude_list" | tr '
-' '|' | sed 's/.$//'`
+ac_exclude_egrep=$exclude_list$ac_exclude_list
 
 
 # au_exclude_list
@@ -183,10 +180,7 @@ au_exclude_list='^AC_LANG_RESTORE$
 # au_exclude_egrep
 # ----------------
 # Build a single extended regular expression out of filter_macros_list.
-# Sed is used to get rid of the trailing `|' coming from the trailing
-# `\n' from `echo'.
-au_exclude_egrep=`echo "$exclude_list$au_exclude_list" | tr '
-' '|' | sed 's/.$//'`
+au_exclude_egrep=$exclude_list$au_exclude_list
 
 
 # egrep