Make git-cl tests work on Mac SnowLeopard

git_cl/test/submit-from-new-dir.sh

 #!/bin/bash
 
 # Check that we're able to submit from a directory that doesn't exist on the
 # trunk.  This tests for a previous bug where we ended up with an invalid CWD
 # after switching to the merge branch.
 
 set -e
 
 . ./test-lib.sh
 
 setup_initsvn
 setup_gitsvn
 
 (
   set -e
   cd git-svn
   git config rietveld.server localhost:8080
 
   # Create a branch and give it an issue.
   git checkout -q -b new
   mkdir dir
   cd dir
   echo "some work done on a branch" >> test
   git add test; git commit -q -m "branch work"
-  export EDITOR=/bin/true
+  export EDITOR=$(which true)
   test_expect_success "upload succeeds" \
     "$GIT_CL upload -m test master... | grep -q 'Issue created'"
   test_expect_success "git-cl dcommits ok" \
     "$GIT_CL dcommit -f"
 )
 
 SUCCESS=$?
 
 cleanup
 
 if [ $SUCCESS == 0 ]; then
   echo PASS
 fi