In a broad and abstract sense (and IMHO), Ruby has a substantial core and community-wide commitment of aiming for that pleasantness, and a track record of achieving it.
I usually compare/contrast to Python's 10 Principles / Zen of Python, which are rather explicitly about the code itself; instead, Ruby has "developer happiness" and "ruby is nice so we are nice". These show up in many, many small ways throughout both the code ecosystem and within the human community (rubyconf!).
There are ofc concrete things to point to, but other comments have already done so, and this bit is a personal fav :)
I usually compare/contrast to Python's 10 Principles / Zen of Python, which are rather explicitly about the code itself; instead, Ruby has "developer happiness" and "ruby is nice so we are nice". These show up in many, many small ways throughout both the code ecosystem and within the human community (rubyconf!).
There are ofc concrete things to point to, but other comments have already done so, and this bit is a personal fav :)