I have made things!

• Improves WPS349 RedundantSubscriptViolation highlighting: now a specific slice index is highlighted, not the entire slice;

if not lower_ok:
    self.add_violation(
        consistency.RedundantSubscriptViolation(node.slice.lower)
    )

if not upper_ok:
    self.add_violation(
        consistency.RedundantSubscriptViolation(node.slice.upper)
    )

if not step_ok:
    self.add_violation(
        consistency.RedundantSubscriptViolation(node.slice.step)
    )

instead of

if not (lower_ok and upper_ok and step_ok):
    self.add_violation(
        consistency.RedundantSubscriptViolation(node)
    )

I find it more appropriate to specify which index contains the redundant grammar

Checklist

• I have double checked that there are no unrelated changes in this pull request (old patches, accidental config files, etc)
• I have created at least one test case for the changes I have made
• I have updated the documentation for the changes I have made
• I have added my changes to the CHANGELOG.md