Scenario:

1. add a new file X to branch BrA, commit

2. svn merge X from branch BrA to branch BrB in working copy (status "A +")

3. modify file Y in working copy, send ONLY file Y (status "M) to changelist CL

4. rbt post --svn-changelist=CL
Expected: post succeeds, because changelist only contains modified files

Actual: post fails with "Please try again with '--svn-show-copies-as-adds=y/n'"; this is because rbt "sees" file X, despite explicitly only posting Y for review.
This patch modifies history_scheduled_with_commit in rbtools/clients/svn.py to pass the --changelist option, if present, down to 'svn st'

The scenario described above now works as expected.