check scalafmt in travis (#1936)

format test and sbt files

project/Checksums.scala

@@ -6,29 +6,31 @@ import io._
 object Checksums {
   private val bufferSize = 2048
 
-  def generate(source:File, target:File, algorithm:String):Unit =
-      sbt.IO write (target, compute(source, algorithm))
+  def generate(source: File, target: File, algorithm: String): Unit =
+    sbt.IO write (target, compute(source, algorithm))
 
-  def compute(file:File, algorithm:String):String =
-      hex(raw(file, algorithm))
+  def compute(file: File, algorithm: String): String =
+    hex(raw(file, algorithm))
 
-  def raw(file:File, algorithm:String):Array[Byte]    =
-      (Using fileInputStream file) { is =>
-        val md  = MessageDigest getInstance algorithm
-        val buf = new Array[Byte](bufferSize)
-        md.reset()
-        @tailrec
-        def loop() {
-          val len = is read buf
-          if (len != -1) {
-            md update (buf, 0, len)
-            loop()
-          }
+  def raw(file: File, algorithm: String): Array[Byte] =
+    (Using fileInputStream file) { is =>
+      val md = MessageDigest getInstance algorithm
+      val buf = new Array[Byte](bufferSize)
+      md.reset()
+      @tailrec
+      def loop() {
+        val len = is read buf
+        if (len != -1) {
+          md update (buf, 0, len)
+          loop()
         }
-        loop()
-        md.digest()
       }
+      loop()
+      md.digest()
+    }
 
-  def hex(bytes:Array[Byte]):String =
-      bytes map { it => "%02x" format (it.toInt & 0xff) } mkString ""
+  def hex(bytes: Array[Byte]): String =
+    bytes map { it =>
+      "%02x" format (it.toInt & 0xff)
+    } mkString ""
 }