Need to run a certain operation on a bunch of lines? E.g. add some text after a certain column or to the end of every line in a buffer? With keyboard macros you can perform your line operations "live" for a line, while recording them, and then replay them …

Writing documentation alongside coding is one of the best ways to ensure that the documentation stays up to date with the code. In Python, such a documentation can be achieved by writing rich docstrings. How can Emacs help us with writing rich docstrings?