I have two directories that contain directories and source files. One directory contains the modified source code and the other one is unmodified source code. And I want to see what source code was modified and see the modified part of the code. And I also want to output the result to a single text file.

I know I have to use the diff tool but I'm not sure what options should I use. Do I need to create a script for this, or is there a one line command to do the task?

bash diff
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