Regardless of if it's the correct name or not, I think what is meant by a "left-leaning code of conduct" is one that puts an emphasis on providing extra protect

Regardless of if it's the correct name or not, I think what is meant by a "left-leaning code of conduct" is one that puts an emphasis on providing extra protection for people who come from "historically disadvantaged or underrepresented" groups, ostensibly as part of an effort to help support their presence in open source. Individually however it can feel unfair where insulting language can draw different punishments depending on the relative privilege of the groups involved.