unamend: error out when running on merge commit It's better to error out than to produce a bad commit. We do that same in `hg uncommit`. I haven't looked into how much work it is to make them work instead. Differential Revision: https://phab.mercurial-scm.org/D12087

Welcome to Mercurial for Windows!
---------------------------------

For configuration and usage directions, please read the ReadMe.html
file that comes with this package.

Also check the release notes at:

 https://mercurial-scm.org/wiki/WhatsNew