If I want to print a markdown file from GitHub as it appears on screen, for example: https://github.com/RestKit/RestKit/blob/master/Docs/Object%20Mapping.md
Then how can
Super easy way that require nothing more than Chrome:
You can spoof the user-agent, telling you are a mobile device, to get a nice printable version.
The way I do it - there are plenty of ways - I use Chrome the Chrome devTools "Emulation" feature to emulate an Android device, e.g. a Samsung Note 3, then in the screen sub-section I remove "Emulate screen", to get full resolution, then I print.