test-share: Solaris sed can't handle never-ending lines

tests/test-share

@@ -1,48 +1,48 b''
 #!/bin/sh
 
 echo "[extensions]"      >> $HGRCPATH
 echo "share = "          >> $HGRCPATH
 
 echo % prepare repo1
 hg init repo1
 cd repo1
 echo a > a
 hg commit -A -m'init'
 
 echo % share it
 cd ..
 hg share repo1 repo2
 
 echo % contents of repo2/.hg
 cd repo2
 [ -d .hg/store ] \
   && echo "fail: .hg/store should not exist" \
   || echo "pass: .hg/store does not exist"
-# sed appends a newline to the stream if none, GNU sed does not
-sed "s:$HGTMP:*HGTMP*:" .hg/sharedpath | tr -d '\n'; echo
+# Some sed versions appends newline, some don't, and some just fails
+(cat .hg/sharedpath; echo) | head -n1 | sed "s:$HGTMP:*HGTMP*:"
 
 echo % commit in shared clone
 echo a >> a
 hg commit -m'change in shared clone'
 
 echo % check original
 cd ../repo1
 hg log
 hg update
 cat a             # should be two lines of "a"
 
 echo % commit in original
 echo b > b
 hg commit -A -m'another file'
 
 echo % check in shared clone
 cd ../repo2
 hg log
 hg update
 cat b             # should exist with one "b"
 
 echo % hg serve shared clone
 hg serve -n test -p $HGPORT -d --pid-file=hg.pid
 cat hg.pid >> $DAEMON_PIDS
 
 "$TESTDIR/get-with-headers.py" localhost:$HGPORT '/raw-file/'