Hello, this is my first experience with open source contributions. Would really appreciate it if you explained exactly what is needed to be done.

I would love to work on this issue.

Thanks in advance! :)

@anushkabishnoi sorry for the slow response. We generally follow a standard GitHub contribution setup, so feel free to read about how to contribute to scikit-learn, nilearn, matplotlib, MNE-Python, etc. (whichever instructions are clearest/easiest). The TL;DR is that you make a PR with the change, and ideally modify some test that would fail on master but pass on your PR (in this case, it could be that the entire > 80 char intro paragraph text shows up in the gallery index for example)

@fgmacedo feel free to give it a shot as well if you want!