Use lazy map in splitToSingleLineRanges

Author: fwcd

Sources/SourceKitLSP/Swift/SyntaxHighlightingTokenParser.swift

@@ -224,6 +224,7 @@ extension Range where Bound == Position {
 
     return lines
       .enumerated()
+      .lazy
       .map { (i, content) in
         let start = Position(
           line: lowerBound.line + i,