How to make `hg diff` show whitespace changes?

[Noemi Millman]

Thanks, Matt!

Why would a merge show a file as changed if contents, permissions, line endings, etc. haven't changed?


> On Jan 13, 2016, at 10:53 AM, Matt Mackall <mpm at selenic.com> wrote:
> 
> On Wed, 2016-01-13 at 07:13 -0800, Noemi wrote:
>> When I run `hg status`, it shows a few files as changed, but `hg diff` 
>> outputs absolutely nothing.  Why might this happen other than whitespace 
>> changes?
> 
> Line ending, empty vs deleted, copies, renames, exec bits, merges, etc.
> 
>>   If it is whitespace changes, how can I make `hg diff` display 
>> them?  The docs explain how to ignore whitespace changes, but not how to 
>> make sure they're displayed.
> 
> They're displayed by default.
> 
> The standard diff tool was created in 1974. Mercurial was created in 2005. So
> asking why the diff format doesn't capture all the details is a bit like asking
> why a VHS (1976) copy of a BluRay (2006) doesn't look as good.
> 
> We also support the Git format with -g which will show some but not all of the
> aforementioned differences and also breaks some of the tools that work with
> standard diffs.
> 
> -- 
> Mathematics is the supreme nostalgia of our time.
>