Unexpected result in git-diff

Question

Why I get this patch:

@@ -129,8 +132,9 @@ sub _preprocess_message {
 sub _process_message {
     my ($self, $message) = @_;

-    my $method = ref($message)          


        

Answer 1

git diff --patience produces the result that you expect. The method tries hard not to mark lines as added or removed when they did not change. It is not the default because it is computationally expensive. (And when the purpose is to generate a patch that is applied later, it does not matter most of the time whether a diff looks the one way or the other.)