Trying to use xfuncname without success.

I'm trying to specify a hunk header using xfuncname, and it just doesn't want to work.

The full question is on SO here:

http://stackoverflow.com/questions/42078376/why-isnt-my-xfuncname-working-in-my-gitconfig-file

But the basic gist is that no matter what regex I specify, git will not recognise the hunk header. Am I doing something wrong or is this a bug?

For those who don't want to jump to the SO site, I've copied the text below:

-----8<--------8<--------8<--------8<--------8<--------8<--------8<--------8<---

I'm trying to setup a hunk header for .natvis files. For some reason, it doesn't seem to be working. I'm following their instructions from here, which doesn't say much in terms of restrictions of the regex, such as, is the matched item considered the hunk header or do I need a group? I have tried both with no success. This is what I have:

[diff "natvis"]
    xfuncname = "^[\\\t ]*<Type[\\\t ]+Name=\"([^\"])\".*$"

I've also added to my .gitattributes file (even though I'm not positive that it is necessary):

*.natvis diff=natvis

I've tried \t instead of \\\t as well as replacing the entire regex with just <Type.* with no luck. I'm using git version 2.7.0.windows.1 on Windows 8.1. EDIT: I upgraded to git version 2.11.1.windows.1 on Windows 8.1 and even tried git version 2.8.3 on cygwin64 on Windows 8.1 with the same results.

As a test file, I have the following test.natvis file:

<?xml version="1.0" encoding="utf-8"?> <AutoVisualizer xmlns="http://schemas.microsoft.com/vstudio/debugger/natvis/2010">

  <Type Name="test">
    <Expand>
      <Item Name="var">var</Item>

      <!-- Non-blank line -->
      <Item Name="added var">added_var</Item>

      <Item Name="var2">var2</Item>
    </Expand>
  </Type>
</AutoVisualizer>

with the <Item Name="added var">added_var</Item> being the new line added.

I'm really not sure why this is so difficult.

EDIT:

Here is a sample output of what I am getting:

$ git diff --word-diff