io.taig.babel.StringFormat6+ works incorrectly

[skrauchenia]

build.sbt

...
libraryDependencies += "org.typelevel" %% "cats-effect" % "3.5.2",
libraryDependencies += "io.taig" %% "babel-core" % "0.5.2",
libraryDependencies += "io.taig" %% "babel-loader" % "0.5.2",
libraryDependencies += "io.taig" %% "babel-generic" % "0.5.2",
libraryDependencies += "io.taig" %% "babel-cats" % "0.5.2"
...

conf/arguments/en.conf

test1 = "{0}"
test2 = "{0} {1}"
test3 = "{0} {1} {2}"
test4 = "{0} {1} {2} {3}"
test5 = "{0} {1} {2} {3} {4}"
test6 = "{0} {1} {2} {3} {4} {5}"
test7 = "{0} {1} {2} {3} {4} {5} {6}"
test8 = "{0} {1} {2} {3} {4} {5} {6}, {7}"
test9 = "{0} {1} {2} {3} {4} {5} {6}, {7}, {8}"

Test.scala

object Test extends App {

  import cats.effect._
  import cats.effect.unsafe.implicits.global
  import cats.syntax.all._
  import io.taig.babel._
  import io.taig.babel.generic.auto._

  final case class I18n(
      test1: StringFormat1,
      test2: StringFormat2,
      test3: StringFormat3,
      test4: StringFormat4,
      test5: StringFormat5,
      test6: StringFormat6,
      test7: StringFormat7,
      test8: StringFormat8,
      test9: StringFormat9
  )

  val i18ns = Loader
    .default[IO]
    .load("arguments", Set(Locales.en))
    .map(Decoder[I18n].decodeAll)
    .rethrow
    .map(_.withFallback(Locales.en))
    .flatMap(_.liftTo[IO](new IllegalStateException("Translations for en missing")))
    .unsafeRunSync()

  println(i18ns(Locales.en).test1("1"))
  println(i18ns(Locales.en).test2("1", "2"))
  println(i18ns(Locales.en).test3("1", "2", "3"))
  println(i18ns(Locales.en).test4("1", "2", "3", "4"))
  println(i18ns(Locales.en).test5("1", "2", "3", "4", "5"))
  println(i18ns(Locales.en).test6("1", "2", "3", "4", "5", "6"))
  println(i18ns(Locales.en).test7("1", "2", "3", "4", "5", "6", "7"))
  println(i18ns(Locales.en).test8("1", "2", "3", "4", "5", "6", "7", "8"))
  println(i18ns(Locales.en).test9("1", "2", "3", "4", "5", "6", "7", "8", "9"))

}

Expected result

1
1 2
1 2 3
1 2 3 4
1 2 3 4 5
1 2 3 4 5 6
1 2 3 4 5 6 7
1 2 3 4 5 6 7 8
1 2 3 4 5 6 7 8 9

Actual result

1
1 2
1 2 3
1 2 3 4
1 2 3 4 5
1 62 3 4 5 
1 6 2 73 4 5 
1 6 2 7, 3 84 5 
1 6 2 7, 3 8, 4 95

[guillaug]

I submitted a PR at #481