As everybody may already know Darcs crashes out when no editor for long comment
is found. It usually looks like:

Shall I record this change? (3/?)  [ynWsfqadjkc], or ? for help:
What is the patch name? svn.to.run.on.windows.fix
Do you want to add a long comment? [yn]
darcs.EXE: vi: runProcess: does not exist (No such file or directory)

Given the interactive nature of Darcs it could easily propose to enter a path
for alternative editor and a hint to set DARCS_EDITOR for future instead of
bailing out. I.e.

Do you want to add a long comment? [yn]
darcs.EXE: vi: runProcess: does not exist (No such file or directory)
Enter path of alternative editor (or Ctrl-Break to exit): far /e
You may want to set DARCS_EDITOR="far /e" for future.

Deferring this.  This is related to the error that causes what's left of
issue770.  Darcs actually tries vi, then emacs (if you haven't already specified
an EDITOR in the environment).  It's just that our detection if a program exists
or not is broken :-(

The following patch updated the status of issue783 to be resolved:

* resolve issue783: propose 'edit' as a default Windows editor 

I think every Windows box has this.  Advantages over notepad are that
- it's a console app
- it appears to support Unix newlines

OMG, what an antiquity! But I am glad it survived.
+1