Some little changes to prep for rolling forward the execroot change

This are random little nits that aren't dependent on changing the
directory structure, so it makes the (rather large) CL that is
coming cleaner.

--
PiperOrigin-RevId: 143690681
MOS_MIGRATED_REVID=143690681

1 files changed, 7 insertions, 6 deletions

diff --git a/src/main/java/com/google/devtools/build/lib/actions/Artifact.java b/src/main/java/com/google/devtools/build/lib/actions/Artifact.java
index 5575e747b1..8072b3af64 100644
--- a/src/main/java/com/google/devtools/build/lib/actions/Artifact.java
+++ b/src/main/java/com/google/devtools/build/lib/actions/Artifact.java
@@ -40,16 +40,17 @@ import java.util.ArrayList;
 import java.util.Collection;
 import java.util.Comparator;
 import java.util.List;
+import java.util.Objects;
 import javax.annotation.Nullable;
 
 /**
  * An Artifact represents a file used by the build system, whether it's a source
  * file or a derived (output) file. Not all Artifacts have a corresponding
- * FileTarget object in the <code>build.packages</code> API: for example,
+ * FileTarget object in the <code>build.lib.packages</code> API: for example,
  * low-level intermediaries internal to a given rule, such as a Java class files
  * or C++ object files. However all FileTargets have a corresponding Artifact.
  *
- * <p>In any given call to Builder#buildArtifacts(), no two Artifacts in the
+ * <p>In any given call to SkyframeExecutor#buildArtifacts(), no two Artifacts in the
  * action graph may refer to the same path.
  *
  * <p>Artifacts generally fall into two classifications, source and derived, but
@@ -191,10 +192,10 @@ public class Artifact
    * </pre>
    *
    * <p>In a derived Artifact, the execPath will overlap with part of the root, which in turn will
-   * be below of the execRoot.
+   * be below the execRoot.
    * <pre>
    *  [path] == [/root][pathTail] == [/execRoot][execPath] == [/execRoot][rootPrefix][pathTail]
-   * <pre>
+   * </pre>
    */
   @VisibleForTesting
   public Artifact(Path path, Root root, PathFragment execPath, ArtifactOwner owner) {
@@ -407,7 +408,7 @@ public class Artifact
    * @see SpecialArtifact
    */
   @VisibleForTesting
-  public static enum SpecialArtifactType {
+  public enum SpecialArtifactType {
     FILESET,
     TREE,
     CONSTANT_METADATA,
@@ -604,7 +605,7 @@ public class Artifact
     // We don't bother to check root in the equivalence relation, because we
     // assume that no root is an ancestor of another one.
     Artifact that = (Artifact) other;
-    return this.path.equals(that.path);
+    return Objects.equals(this.path, that.path);
   }
 
   @Override