ReplaceSubstringWithDropLast

Reports calls like s.substring(0, s.length - x) that can be replaced with s.dropLast(x).

Using corresponding functions makes your code simpler.

The quick-fix replaces the substring call with dropLast.

Example:

fun foo(s: String) {
      s.substring(0, s.length - 5)
  }

After the quick-fix is applied:

fun foo(s: String) {
      s.dropLast(5)
  }