Printing formatted character counts for the lines of a url

Listing-3.scala

// Listing 3.11 Printing formatted character counts for the lines of a url
import scala.io.Source

def widthOfLength(s: String) = s.length.toString.length

val lines = Source.fromURL("https://gist.githubusercontent.com/msbaek/e830f66f5165fbbb844e/raw/d48da60bb3479f5f708367e677a492462afcf66e/gistfile1.scala", "utf8").getLines().toList
val longestLine = lines.reduceLeft(
  (a, b) => if(a.length > b.length) a else b
)
val maxWidth = widthOfLength(longestLine)
for(line <- lines) {
  val numSpaces = maxWidth - widthOfLength(line)
  val padding = " " * numSpaces
  println(padding + line.length + " | " + line)
}