Please stop.
I get the idea behind having a streamlined formatting style, but I’m really not a fan of denying users the flexibility to adjust it to their needs. Consistency across projects is nice, yet forcing everyone into a single indentation style feels unnecessarily rigid. A little configurability would go a long way :)
About the only argument I find remotely convincing from language devs (Nim is another similar lang) is that they don't want to maintain anything extra. Fair enough. The other arguments they roll out are always specious. The stuff in the issue above is comical: default GH tab width is 8, don't want Gleam to look weird to people looking at Gleam on GH, so force 2 spaces.. lol. Sometimes it seems like lang maintainers get a little too far up their own arses about this stuff. Your v0.x just-past-toy lang with a weak std lib and barely any ecosystem isn't turning off potential adopters because of how default indentation looks on one - arguably the worst - forge.. it's turning adopters away because of these silly hills you choose to die on. Nearly all mainstream langs handle spaces or tabs; forcing 2 spaces is just more "perceived strangeness", as a maintainer on that issue put it. It's your lang, do as you like with it, but if you want growth, don't be arbitrarily rigid.
This is indeed comical. At the same time, it's an odd choice for GH to display eight spaces for a tab nowadays. Perhaps a punishment that the source code uses tab characters at all?
I think Idea IDEs have that flexibility... Not sure.
I'll accept that tabs unfortunately lost the tabs/spaces war (too complicated for many people I guess), but let's at least stick to 4 spaces please.