Only the "markdownquote" thing is kinda pointless, especially since they mention it's mainly used in vim. Because vim can do exactly that already without the need of an external script. Do ctrl+v, mark the lines you want, press "I" (capital i), insert the desired thing, press esc and voila... all the selected lines are now prepended with the desired thing.
edited to make my comment sound less harsh:
Nothing wrong with building your own solution if that feels better to oneself though :-)
Fun fact: Kodak had some issues with gelatine that contained too much sulfur back in the 1920s, which ruined a lot of the material they were producing. Happened because the cows have eaten a different type of grass.
This led to Kodak becoming a large cattle farming company too, so they had control over that part.
Side effect of this was the development of faster film.
Ousterhouts book was very much an eye opener for me when i stumbled over it some years ago.
All those recommendations from the "clean code" corner always felt a tad off to me, but i couldn't put the finger on it. Then i read this small and nicely written book an suddenly the fog cleared up.
Please do yourself a favor and get proper tire levers. An allen key is the absolute wrong tool here. It will ruin your rim and possibly kill the tubes.
And this is why you never go on a ride without a basic repair kit that includes at least: a pump, two(!) tire levers, a small bicycle multitool, a tube and a patch kit (you might fuck up the new tube while mounting it...etc).
They also apparently didn't do any input validation. This is why a faulty config was able to even trigger all of that.