diff --git a/README.md b/README.md
index b9e97aac..cb85d55b 100644
--- a/README.md
+++ b/README.md
@@ -1,5 +1,4 @@
-scala-parser-combinators [<img src="https://img.shields.io/travis/scala/scala-parser-combinators.svg"/>](https://travis-ci.org/scala/scala-parser-combinators) [<img src="https://img.shields.io/maven-central/v/org.scala-lang.modules/scala-parser-combinators_2.11.svg?label=latest%20release%20for%202.11"/>](http://search.maven.org/#search%7Cga%7C1%7Cg%3Aorg.scala-lang.modules%20a%3Ascala-parser-combinators_2.11) [<img src="https://img.shields.io/maven-central/v/org.scala-lang.modules/scala-parser-combinators_2.12.svg?label=latest%20release%20for%202.12"/>](http://search.maven.org/#search%7Cga%7C1%7Cg%3Aorg.scala-lang.modules%20a%3Ascala-parser-combinators_2.12) [![Gitter](https://badges.gitter.im/Join%20Chat.svg)](https://gitter.im/scala/scala-parser-combinators)
-========================
+# scala-parser-combinators [<img src="https://img.shields.io/travis/scala/scala-parser-combinators.svg"/>](https://travis-ci.org/scala/scala-parser-combinators) [<img src="https://img.shields.io/maven-central/v/org.scala-lang.modules/scala-parser-combinators_2.11.svg?label=latest%20release%20for%202.11"/>](http://search.maven.org/#search%7Cga%7C1%7Cg%3Aorg.scala-lang.modules%20a%3Ascala-parser-combinators_2.11) [<img src="https://img.shields.io/maven-central/v/org.scala-lang.modules/scala-parser-combinators_2.12.svg?label=latest%20release%20for%202.12"/>](http://search.maven.org/#search%7Cga%7C1%7Cg%3Aorg.scala-lang.modules%20a%3Ascala-parser-combinators_2.12) [![Gitter](https://badges.gitter.im/Join%20Chat.svg)](https://gitter.im/scala/scala-parser-combinators)
 
 ### Scala Standard Parser Combinator Library
 
@@ -29,24 +28,23 @@ To support multiple Scala versions, see the example in [scala/scala-module-depen
 import scala.util.parsing.combinator._
 
 case class WordFreq(word: String, count: Int) {
-    override def toString = "Word <" + word + "> " +
-                            "occurs with frequency " + count
+  override def toString = s"Word <$word> occurs with frequency $count"
 }
 
 class SimpleParser extends RegexParsers {
-    def word: Parser[String]   = """[a-z]+""".r       ^^ { _.toString }
-    def number: Parser[Int]    = """(0|[1-9]\d*)""".r ^^ { _.toInt }
-    def freq: Parser[WordFreq] = word ~ number        ^^ { case wd ~ fr => WordFreq(wd,fr) }
+  def word: Parser[String]   = """[a-z]+""".r       ^^ { _.toString }
+  def number: Parser[Int]    = """(0|[1-9]\d*)""".r ^^ { _.toInt }
+  def freq: Parser[WordFreq] = word ~ number        ^^ { case wd ~ fr => WordFreq(wd,fr) }
 }
 
 object TestSimpleParser extends SimpleParser {
-    def main(args: Array[String]) = {
-        parse(freq, "johnny 121") match {
-            case Success(matched,_) => println(matched)
-            case Failure(msg,_) => println("FAILURE: " + msg)
-            case Error(msg,_) => println("ERROR: " + msg)
-        }
+  def main(args: Array[String]) = {
+    parse(freq, "johnny 121") match {
+      case Success(matched,_) => println(matched)
+      case Failure(msg,_) => println(s"FAILURE: $msg")
+      case Error(msg,_) => println(s"ERROR: $msg")
     }
+  }
 }
 ```