Don't use sed -r; instead use old-style regexp

Rev d895158fe8af introduced some sed -r tests, but -r is only available on GNU
sed, while BSD sed uses -E. Better to use old-style regular expressions, that
way the tests work on all sed variants.

tests/test-hgwebdir

@@ -1,106 +1,106
 #!/bin/sh
 # Tests some basic hgwebdir functionality. Tests setting up paths and
 # collection, different forms of 404s and the subdirectory support.
 
 mkdir webdir
 cd webdir
 
 hg init a
 echo a > a/a
 hg --cwd a ci -Ama -d'1 0'
 # create a mercurial queue repository
 hg --cwd a qinit --config extensions.hgext.mq= -c
 
 hg init b
 echo b > b/b
 hg --cwd b ci -Amb -d'2 0'
 
 # create a nested repository
 cd b
 hg init d
 echo d > d/d
 hg --cwd d ci -Amd -d'3 0'
 cd ..
 
 hg init c
 echo c > c/c
 hg --cwd c ci -Amc -d'3 0'
 
 root=`pwd`
 cd ..
 
 cat > paths.conf <<EOF
 [paths]
 a=$root/a
 b=$root/b
 EOF
 
 hg serve -p $HGPORT -d --pid-file=hg.pid --webdir-conf paths.conf \
     -A access-paths.log -E error-paths-1.log
 cat hg.pid >> $DAEMON_PIDS
 
 echo % should give a 404 - file does not exist
 "$TESTDIR/get-with-headers.py" localhost:$HGPORT '/a/file/tip/bork?style=raw'
 
 echo % should succeed
 "$TESTDIR/get-with-headers.py" localhost:$HGPORT '/?style=raw'
 "$TESTDIR/get-with-headers.py" localhost:$HGPORT '/a/file/tip/a?style=raw'
 "$TESTDIR/get-with-headers.py" localhost:$HGPORT '/b/file/tip/b?style=raw'
 
 echo % should give a 404 - repo is not published
 "$TESTDIR/get-with-headers.py" localhost:$HGPORT '/c/file/tip/c?style=raw'
 
 cat > paths.conf <<EOF
 [paths]
 t/a/=$root/a
 b=$root/b
 coll=$root/*
 rcoll=$root/**
 EOF
 
 hg serve -p $HGPORT1 -d --pid-file=hg.pid --webdir-conf paths.conf \
     -A access-paths.log -E error-paths-2.log
 cat hg.pid >> $DAEMON_PIDS
 
 echo % should succeed, slashy names
 "$TESTDIR/get-with-headers.py" localhost:$HGPORT1 '/?style=raw'
 "$TESTDIR/get-with-headers.py" localhost:$HGPORT1 '/?style=paper' \
-	| sed -r "s/[0-9]+ seconds? ago/seconds ago/"
+	| sed "s/[0-9]\{1,\} seconds\{0,1\} ago/seconds ago/"
 "$TESTDIR/get-with-headers.py" localhost:$HGPORT1 '/t?style=raw'
 "$TESTDIR/get-with-headers.py" localhost:$HGPORT1 '/t/?style=raw'
 "$TESTDIR/get-with-headers.py" localhost:$HGPORT1 '/t/?style=paper' \
-	| sed -r "s/[0-9]+ seconds? ago/seconds ago/"
+	| sed "s/[0-9]\{1,\} seconds\{0,1\} ago/seconds ago/"
 "$TESTDIR/get-with-headers.py" localhost:$HGPORT1 '/t/a?style=atom' \
 	| sed "s/http:\/\/[^/]*\//http:\/\/127.0.0.1\//"
 "$TESTDIR/get-with-headers.py" localhost:$HGPORT1 '/t/a/?style=atom' \
 	| sed "s/http:\/\/[^/]*\//http:\/\/127.0.0.1\//"
 "$TESTDIR/get-with-headers.py" localhost:$HGPORT1 '/t/a/file/tip/a?style=raw'
 # Test [paths] '*' extension
 "$TESTDIR/get-with-headers.py" localhost:$HGPORT1 '/coll/?style=raw'
 "$TESTDIR/get-with-headers.py" localhost:$HGPORT1 '/coll/a/file/tip/a?style=raw'
 #test [paths] '**' extension
 "$TESTDIR/get-with-headers.py" localhost:$HGPORT1 '/rcoll/?style=raw'
 "$TESTDIR/get-with-headers.py" localhost:$HGPORT1 '/rcoll/b/d/file/tip/d?style=raw'
 
 
 cat > collections.conf <<EOF
 [collections]
 $root=$root
 EOF
 
 hg serve -p $HGPORT2 -d --pid-file=hg.pid --webdir-conf collections.conf \
     -A access-collections.log -E error-collections.log
 cat hg.pid >> $DAEMON_PIDS
 
 echo % collections: should succeed
 "$TESTDIR/get-with-headers.py" localhost:$HGPORT2 '/?style=raw'
 "$TESTDIR/get-with-headers.py" localhost:$HGPORT2 '/a/file/tip/a?style=raw'
 "$TESTDIR/get-with-headers.py" localhost:$HGPORT2 '/b/file/tip/b?style=raw'
 "$TESTDIR/get-with-headers.py" localhost:$HGPORT2 '/c/file/tip/c?style=raw'
 
 echo % paths errors 1
 cat error-paths-1.log
 echo % paths errors 2
 cat error-paths-2.log
 echo % collections errors
 cat error-collections.log