BE CONSISTENT.
If you're editing code, take a few minutes to look at the code around you and determine its style. If they use spaces around all their arithmetic operators, you should too. If their comments have little boxes of hash marks around them, make your comments have little boxes of hash marks around them too.
The point of having style guidelines is to have a common vocabulary of coding so people can concentrate on what you're saying rather than on how you're saying it. We present global style rules here so people know the vocabulary, but local style is also important. If code you add to a file looks drastically different from the existing code around it, it throws readers out of their rhythm when they go to read it. Avoid this.
As much as you don't like using 4 spaces, it's much worse to have a codebase littered with some sections using 4 spaces, some sections using tabs, some sections using 2 spaces, some sections using 8 spaces, and some sections using a random assortment of nothing in particular.
Just as you accept the apparent standard of 2 spaces when working within the Ruby community, for consistency's sake I'd hope you would accept the standard of whatever other team you're working with.
That's part of collaboration basics:
* Try to find an acceptable middle ground for the minor things and focus on coding and not politics.
* Don't be a douche.
~2ยข
Isobar front end engineer here...
What you're looking at is a document that serves as OUR internal standard. We just made it public because we think people might find it useful. We understand what we do internally may not work for everyone, but that's part of the fun of sharing documents like this. We learn too.
With that said, it's probably not a bad idea to have discussions around such standards with the understanding that there may be more than one good way to skin a cat.