Update to 1.10. From the changelog:

1.10:
* Fix display of trust errors.

1.09:
* Remove dir_test hack and add a way for vcs tests to run perl code,
  using this for the same optimisation. Fixes support for git-svn
  etc. Closes: #652317

1.08:
* Fix vcs test code. Closes: #651976

1.07
* Added support for vcsh, enable with: include = cat /usr/share/mr/vcsh
  Thanks, Richard Hartmann
* Block tty control codes in untrusted mr config files.
* Correct printing of line numbers when includes are used. Closes: #650952
* The previous fix for chaining to absolute paths broke chaining
  to relative paths with more than one path segment. Thanks, Adam
  Spiers
* Support _append to add on to the existing value of a parameter.
  Thanks, Adam Spiers
* Optimizations. Commands like "mr list" run up to 5 times faster.
* Fix shell escaping of parameters passed to mr commands. Closes: #644672
* Added --force option that disables repository skipping.
* Repositories using skip = lazy will not be checked out by "mr
  update" or "mr checkout" unless --force is used.

(schmonz)