fixup! Revise doc comments for API reference style.

Author: amartini51

Sources/_StringProcessing/Algorithms/Algorithms/Split.swift

@@ -311,7 +311,6 @@ extension BidirectionalCollection where SubSequence == Substring {
   /// - Parameter separator: A regex describing elements to be split upon.
   /// - Returns: A collection of substrings, split from this collection's
   ///   elements.
-  /// elements.
   public func split<R: RegexComponent>(
     by separator: R
   ) -> [SubSequence] {