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Whether you’re debugging a regression or trying to understand how some code came to have its current shape, you’ll often want to see what a file looked like before a…
Whether you’re debugging a regression or trying to understand how some code came to have its current shape, you’ll often want to see what a file looked like before a particular change. With improved blame view, you can easily see how any portion of your file has evolved over time without viewing the file’s full history.

Check out the GitHub Help documentation for more information on using git blame to trace the changes in a file.