Currently catch-error-name and prevent-abbreviations auto-fix may add _ to variables, like error_ to avoid syntax error. Main purpose of this rule is to remove unnessassary trailing underscore.

Run prevent-abbreviations against this code

const cur = 1;
const curr = 2;
const current = 3;

will fix to

const current_ = 1;
const current__ = 2;
const current = 3;

Someday, we decide not to use current anymore, so the tailing underscore of current_ and current__ become weird, we can have a rule to reorganize them.

Fail

const foo_ = 1;

const foo = 1;
const foo__ = 1;

Pass

const foo = 1;

const foo = 1;
const foo_ = 1;

Additionally maybe we can also fix trailing numbers, like

const array2 = [];
const array4 = [];

Should be

const array = [];
const array2 = [];

I don't have any idea about name of this rule, if it only work on _, we can have a funny name, because this rule should not disabled by anyone.