Fix compiler-project/semantic-errors

sbt/src/sbt-test/compiler-project/semantic-errors/build.sbt

@@ -1,5 +1,3 @@
-
-
 TaskKey[Unit]("checkJavaFailures") := {
   val reporter = savedReporter.value
   val ignore = (compile in Compile).failure.value
@@ -26,4 +24,4 @@ TaskKey[Unit]("checkScalaFailures") := {
   assert(file == scalaFile, s"First failure file location is not $scalaFile, $first")
 }
 
-compileOrder := CompileOrder.Mixed
+compileOrder := CompileOrder.Mixed

sbt/src/sbt-test/compiler-project/semantic-errors/project/src/main/scala/sbt/TestPlugin.scala

@@ -1,6 +1,7 @@
 package sbt
 
-import Keys._
+import sbt.syntax._
+import sbt.Keys._
 import xsbti.{Position, Severity}
 
 object TestPlugin extends AutoPlugin {