A typical error I (and colleagues) run into is as follows:

mylist = ["a", "b" "c"] 
# results in:
mylist # ['a', 'bc']

# as opposed to the intended ["a", "b", "c"] 

While this pattern is often well known, this pattern can often lead to unintended side effects, which are hard to track and detect.

This suggestion is in line with pep3126 (which was rejected due to "the feature to be removed isn’t all that harmful").

I have searched existing ruff rules and only found the ISC rules, which do not cover this pattern. The proposed pattern is in line with some of the ISC rules (ISC001), while I would say it disagrees with (ISC003)