patchbomb: fix 'echo -en' bashism in test-patchbomb

The echo command doesn't accept options in some shells.
printf is required by the SUSv2 (Single UNIX Specification v2).

tests/test-patchbomb

@@ -1,179 +1,179 b''
 #!/bin/sh
 
 fixheaders()
 {
     sed -e 's/\(Message-Id:.*@\).*/\1/'  \
         -e 's/\(In-Reply-To:.*@\).*/\1/' \
         -e 's/\(References:.*@\).*/\1/'  \
         -e 's/\(User-Agent:.*\)\/.*/\1/'  \
         -e 's/===.*/===/'
 }
 
 echo "[extensions]" >> $HGRCPATH
 echo "patchbomb=" >> $HGRCPATH
 
 COLUMNS=80; export COLUMNS
 
 hg init t
 cd t
 echo a > a
 hg commit -Ama -d '1 0'
 
 hg email --date '1970-1-1 0:1' -n -f quux -t foo -c bar -r tip | \
   fixheaders
 
 echo b > b
 hg commit -Amb -d '2 0'
 
 hg email --date '1970-1-1 0:2' -n -f quux -t foo -c bar -s test -r 0:tip | \
   fixheaders
 
 hg email -m test.mbox -f quux -t foo -c bar -s test 0:tip
 
 cd ..
 
 hg clone -q t t2
 cd t2
 echo c > c
 hg commit -Amc -d '3 0'
 
 cat > description <<EOF
 a multiline
 
 description
 EOF
 
 echo "% test bundle and description"
 hg email --date '1970-1-1 0:3' -n -f quux -t foo \
     -c bar -s test -r tip -b --desc description | \
     fixheaders
 
 echo "% utf-8 patch"
 python -c 'fp = open("utf", "wb"); fp.write("h\xC3\xB6mma!\n"); fp.close();'
 hg commit -A -d '4 0' -m 'charset=utf-8; content-transfer-encoding: base64'
 
 echo "% no mime encoding for email --test"
 hg email --date '1970-1-1 0:4' -f quux -t foo -c bar -r tip -n | \
     fixheaders > mailtest
 echo "% md5sum of 8-bit output"
 $TESTDIR/md5sum.py mailtest
 rm mailtest
 
 echo "% mime encoded mbox (base64)"
 hg email --date '1970-1-1 0:4' -f quux -t foo -c bar -r tip -m mbox
 cat mbox | fixheaders
 rm mbox
 
 echo "% mime encoded mbox (quoted-printable)"
 python -c 'fp = open("qp", "wb"); fp.write("%s\nfoo\n\nbar\n" % \
   ("x" * 1024)); fp.close();'
 hg commit -A -d '4 0' -m \
     'charset=utf-8; content-transfer-encoding: quoted-printable'
 
 echo "% no mime encoding for email --test"
 hg email --date '1970-1-1 0:4' -f quux -t foo -c bar -r tip -n | \
     fixheaders > mailtest
 echo "% md5sum of qp output"
 $TESTDIR/md5sum.py mailtest
 rm mailtest
 
 echo "% mime encoded mbox (quoted-printable)"
 hg email --date '1970-1-1 0:4' -f quux -t foo -c bar -r tip -m mbox
 cat mbox | fixheaders
 rm mbox
 
 echo "% iso-8859-1 patch"
 python -c 'fp = open("isolatin", "wb"); fp.write("h\xF6mma!\n"); fp.close();'
 hg commit -A -d '5 0' -m 'charset=us-ascii; content-transfer-encoding: 8bit'
 
 echo "% fake ascii mbox"
 hg email --date '1970-1-1 0:5' -f quux -t foo -c bar -r tip -m mbox
 fixheaders < mbox > mboxfix
 echo "% md5sum of 8-bit output"
 $TESTDIR/md5sum.py mboxfix
 
 echo "% test diffstat for single patch"
 hg email --date '1970-1-1 0:1' -n -f quux -t foo -c bar -s test -d -y -r 2 | \
   fixheaders
 
 echo "% test diffstat for multiple patches"
 hg email --date '1970-1-1 0:1' -n -f quux -t foo -c bar -s test -d -y \
   -r 0:1 | fixheaders
 
 echo "% test inline for single patch"
 hg email --date '1970-1-1 0:1' -n -f quux -t foo -c bar -s test -i -r 2 | \
   fixheaders
 
 echo "% test inline for single patch (quoted-printable)"
 hg email --date '1970-1-1 0:1' -n -f quux -t foo -c bar -s test -i -r 4 | \
   fixheaders
 
 echo "% test inline for multiple patches"
 hg email --date '1970-1-1 0:1' -n -f quux -t foo -c bar -s test -i \
   -r 0:1 -r 4 | fixheaders
 
 echo "% test attach for single patch"
 hg email --date '1970-1-1 0:1' -n -f quux -t foo -c bar -s test -a -r 2 | \
   fixheaders
 
 echo "% test attach for single patch (quoted-printable)"
 hg email --date '1970-1-1 0:1' -n -f quux -t foo -c bar -s test -a -r 4 | \
   fixheaders
 
 echo "% test attach for multiple patches"
 hg email --date '1970-1-1 0:1' -n -f quux -t foo -c bar -s test -a \
   -r 0:1 -r 4 | fixheaders
 
 echo "% test intro for single patch"
 hg email --date '1970-1-1 0:1' -n --intro -f quux -t foo -c bar -s test \
   -r 2 | fixheaders
 
 echo "% test intro for multiple patches"
 hg email --date '1970-1-1 0:1' -n --intro -f quux -t foo -c bar -s test \
   -r 0:1 | fixheaders
 
 echo "% tagging csets"
 hg tag -r0 zero zero.foo
 hg tag -r1 one one.patch
 hg tag -r2 two two.diff
 
 echo "% test inline for single named patch"
 hg email --date '1970-1-1 0:1' -n -f quux -t foo -c bar -s test -i -r 2 | \
   fixheaders
 
 echo "% test inline for multiple named/unnamed patches"
 hg email --date '1970-1-1 0:1' -n -f quux -t foo -c bar -s test -i -r 0:1 | \
   fixheaders
 
 echo "% test inreplyto"
 hg email --date '1970-1-1 0:1' -n -f quux -t foo -c bar --in-reply-to baz \
   -r tip | fixheaders
 
 hg email --date '1970-1-1 0:1' -n -f quux -t foo -c bar --in-reply-to baz \
   -r 0:1 | fixheaders
 
 hg email --date '1970-1-1 0:1' -n -f quux -t foo -c bar --in-reply-to baz \
   -s test -r 0:1 | fixheaders
 
 echo "% test single flag for single patch"
 hg email --date '1970-1-1 0:1' -n --flag fooFlag -f quux -t foo -c bar -s test \
   -r 2 | fixheaders
 
 echo "% test single flag for multiple patches"
 hg email --date '1970-1-1 0:1' -n --flag fooFlag -f quux -t foo -c bar -s test \
   -r 0:1 | fixheaders
 
 echo "% test mutiple flags for single patch"
 hg email --date '1970-1-1 0:1' -n --flag fooFlag --flag barFlag -f quux -t foo \
  -c bar -s test -r 2 | fixheaders
 
 echo "% test multiple flags for multiple patches"
 hg email --date '1970-1-1 0:1' -n --flag fooFlag --flag barFlag -f quux -t foo \
  -c bar -s test -r 0:1 | fixheaders
 
 echo "% test multi-byte domain parsing"
-UUML=`echo -en '\xfc'`
+UUML=`printf '\374'`
 export HGENCODING=iso-8859-1
 hg email --date '1980-1-1 0:1' -m tmp.mbox -f quux -t "bar@${UUML}nicode.com" \
   -s test -r 0
 cat tmp.mbox | fixheaders