* Mac OS X 10.5 compatibility: `echo -n foo' suddenly prints `-n foo'

instead of `foo' without a newline (with /bin/sh, not /bin/bash,
  even though /bin/sh is also bash...).  So use printf instead.

tests/hash.sh

@@ -1,7 +1,7 @@
 source common.sh
 
 try () {
-    echo -n "$2" > $TEST_ROOT/vector
+    printf "%s" "$2" > $TEST_ROOT/vector
     hash=$($nixhash $EXTRA --flat --type "$1" $TEST_ROOT/vector)
     if test "$hash" != "$3"; then
         echo "hash $1, expected $3, got $hash"