Cleanup & simplify actions/generator

sbt/src/sbt-test/actions/doc-scala-instance/build.sbt

@@ -1,8 +1,8 @@
 lazy val a = project.settings(
 	scalaVersion := "2.12.2",
-	scalaInstance in (Compile,doc) := (scalaInstance in b).value,
+	scalaInstance in (Compile, doc) := (scalaInstance in b).value,
 	// 2.10.1-only, so this will only succeed if `doc` recognizes the more specific scalaInstance scoped to `doc`
-	scalacOptions in (Compile,doc) += "-implicits"
+	scalacOptions in (Compile, doc) += "-implicits"
 )
 
 lazy val b = project.settings(

sbt/src/sbt-test/actions/generator/build.sbt

@@ -1,13 +1,11 @@
-lazy val buildInfo = taskKey[Seq[File]]("The task that generates the build info.")
+scalaVersion := "2.11.8"
 
-lazy val root = (project in file("."))
-  .settings(
-    scalaVersion := "2.11.8",
-    buildInfo := {
-      val x = sourceManaged.value / "BuildInfo.scala"
-      IO.write(x, """object BuildInfo""")
-      x :: Nil
-    },
-    sourceGenerators in Compile += buildInfo,
-    sourceGenerators in Compile += Def.task { Nil }
-  )
+val buildInfo = taskKey[Seq[File]]("generates the build info")
+buildInfo := {
+  val file = sourceManaged.value / "BuildInfo.scala"
+  IO.write(file, "object BuildInfo")
+  file :: Nil
+}
+
+sourceGenerators in Compile += buildInfo
+sourceGenerators in Compile += Def.task { Nil }