- Mercurial 3.3
- .arcconfig: `"history.immutable" : false`
- Editor: nano
# Make local changes to working directory
# Create differential revision with `arc diff`
# Update to master bookmark, leaving diff changes in separate bookmark.
# Make more local changes to working directory.
# Start `arc diff --update Dxxx`
# When prompted to supply description of change in nano, exit nano without writing out changes
# Arc completes with: `Usage Exception: User aborted the workflow.`
# Examine state of working directory: `hg stat`
# The changes in the local working directory were amended to the bookmark for Dxxx.