Mercurial: Better command line interpretation?

Question

I am wondering how to improve diff command as part of hg. For example, let's say I have this code:

line 1 
line 2
lin3 3

and I change it to become:

if($condition) {
   line 1
   line 2
   line 3
}

hg diff will display the original three lines with a "-" and the new five lines with a "+". Even when I run with -wbB to ignore spaces and line changes. I understand what he is trying to tell me, but can it be “smarter” and understand that I added only two lines (and increased the level of three lines)?

EDIT: Is it possible that hg diff will tell you which text was added and where? In contrast to how the "structure" of the code has changed due to these additions?

EDIT 2: I am running Debian (Linux dev 2.6.26) with Mercurial 1.0.1

thank

Answer 1

, . hg diff --ignore-space-change, :

+ if($condition) {
   line 1
   line 2
   line 3
+ }

, . ExtDiff Extension diff @sarnold.

Mercurial. , Debian .

Answer 2

- , DiffMerge ( Windows, Kdiff3 Debian) diff :

, , ( ), mercurial.