Should store commit message if committing fails

[Jelmer Vernooij]

  affects /products/bzr

If the gpg signing command fails and signing is required, the commit
will fail. The commit message should be saved in this case and the user
should be told where the file with the commit message is.

[Alexandre Garnier (zigarn)]

Not only if signing fails but if commit fails

Just like CVS does : indicate how to re-commit with the message from the saved file.

[Robert Collins (lifeless)]

Yes, thats true. Note that we do all of the commit *except* three things: signing, pushing if the branch is bound, and updating the branch tip pointers; so there is very little room for failure after the message is asked for.