[PATCH V2] context: override workingctx.hex() to avoid a crash

[Matt Harbison]

On Tue, 16 Jun 2015 17:22:01 -0400, Matt Mackall <mpm at selenic.com> wrote:

> On Mon, 2015-06-15 at 22:33 -0400, Matt Harbison wrote:
>> # HG changeset patch
>> # User Matt Harbison <matt_harbison at yahoo.com>
>> # Date 1434333857 14400
>> #      Sun Jun 14 22:04:17 2015 -0400
>> # Node ID e8aad4e14a74b6034d48183d737d52e78ba4c6b4
>> # Parent  a69983942fb4dbfdf5ca8c7a123120ed09ead5db
>> context: override workingctx.hex() to avoid a crash
>
> Queued for default, thanks. I'm still a bit anxious about this, though,
> so let's not add too many dependencies on this idea right away.

My plan after getting the wdir() archiving landed is to change how the  
metadata file is built, so that it will display {p1node}+ if necessary.   
That's at least a bit more informative than all 'f's.

This just seemed like a pothole that needed filling.