Address review comments

Author: Duhemm

project/Build.scala

@@ -289,7 +289,8 @@ object Build {
         compilerJar = jars.find(_.getName.startsWith("dotty-compiler_2.12")).get
       }
 
-      // All compiler dependencies except the library
+      // All dotty-doc's and compiler's dependencies except the library.
+      // (we get the compiler's dependencies because dottydoc depends on the compiler)
       val otherDependencies = {
         val excluded = Set("dotty-library", "dotty-compiler")
         fullClasspath.in(`dotty-doc`, Compile).value

sbt-dotty/src/dotty/tools/sbtplugin/DottyPlugin.scala

@@ -4,7 +4,6 @@ import sbt._
 import sbt.Keys._
 import sbt.librarymanagement.DependencyResolution
 import sbt.internal.inc.ScalaInstance
-// import sbt.inc.{ ClassfileManager, IncOptions }
 import xsbti.compile._
 import java.net.URLClassLoader
 import java.util.Optional
@@ -199,6 +198,7 @@ object DottyPlugin extends AutoPlugin {
     )
   }
 
+  /** Fetch artefacts for scalaOrganization.value %% moduleName % scalaVersion.value */
   private def fetchArtifactsOf(moduleName: String) = Def.task {
     val dependencyResolution = Keys.dependencyResolution.value
     val log = streams.value.log