It breaks the at-a-glance blame. But the blame output looks like this: Bob | abcdefg (Changed some whitespace) | def my_function(): Bob | abcdefg (Chan

It breaks the at-a-glance blame. But the blame output looks like this: Bob | abcdefg (Changed some whitespace) | def my_function(): Bob | abcdefg (Changed some whitespace) | return whatever() So if you really want to know the history of a function, you can just click the revision number to get to the rest of the history. And it's not just whitespace changes that do this, of course. Any refectoring work, splitting files, renaming functions, etc will do it too.