tldr: refactoring

venv/lib/python3.7/site-packages/git/test/fixtures/diff_f

@@ -0,0 +1,15 @@
+diff --git a/lib/grit/diff.rb b/lib/grit/diff.rb
+index 537955bb86a8ceaa19aea89e75ccbea5ce6f2698..00b0b4a67eca9242db5f8991e99625acd55f040c 100644
+--- a/lib/grit/diff.rb
++++ b/lib/grit/diff.rb
+@@ -27,6 +27,10 @@ module Grit
+       while !lines.empty?
+         m, a_path, b_path = *lines.shift.match(%r{^diff --git a/(\S+) b/(\S+)$})
+         
++        if lines.first =~ /^old mode/
++          2.times { lines.shift }
++        end
++        
+         new_file = false
+         deleted_file = false
+