UNIFIED_DIFF_CHUNK_REGEXP should include header

[Michael]

Describe the bug
The UNIFIED_DIFF_CHUNK_REGEXP regex is looking for @@ -9,6 +9,10 @@ but needs to included optional text afterwards, @@ -9,6 +9,10 @@ node_modules

To Reproduce
Steps to reproduce the behavior:

1. Use a patch that has the function header on the chunk like:

--- a/.gitignore
+++ b/.gitignore
@@ -9,6 +9,10 @@ node_modules
 /.DS_Store
 /.settings
 /.project
+/temp

Expected behavior
Should be able to parse in both patches. After doing some research this is in newer version of git but I may be wrong