test-rename-merge2: fix test failure on Windows
Windows and OpenVMS use double quote for shell quoting, posix uses
single quote. Since the other test lines added in
5668202cfaaf don't
include the quotes, this was presumably an oversight.
fixbundle() {
grep -v 'saving bundle' | grep -v 'saved backup' | \
grep -v added | grep -v adding | \
grep -v "unable to find 'e' for patching" | \
grep -v "e: No such file or directory"
}