syntax aware diff tools?

Are there any (ideally GUI) diff tools that are aware of syntax?

As an example of the kind of thing I'm looking for, I keep finding that my current tool miss aligns repetitive code:

Foo  = { 'hello': 'world',    |  Foo  = { 'hello': 'world',
         'goodnight': 'moon'  |           'goodnight': 'moon'  
       }                      <
                              <
Bar  = { 'picture': 1000,     <
       }                      |         }

I'd like a tool that would try and make matching braces on one side align with matching braces on the other.

Edit: I'm looking for a tool that can automatically spot that condition and correct it's alignment.