Update outdated comment

RELNOTES: None
PiperOrigin-RevId: 152947523
diff --git a/src/main/java/com/google/devtools/build/lib/cmdline/PackageIdentifier.java b/src/main/java/com/google/devtools/build/lib/cmdline/PackageIdentifier.java
index 3c82f6c..2deba30 100644
--- a/src/main/java/com/google/devtools/build/lib/cmdline/PackageIdentifier.java
+++ b/src/main/java/com/google/devtools/build/lib/cmdline/PackageIdentifier.java
@@ -97,10 +97,13 @@
    */
   private final RepositoryName repository;
 
-  /** The name of the package. Canonical (i.e. x.equals(y) <=> x==y). */
+  /** The name of the package. */
   private final PathFragment pkgName;
 
-  /** Precomputed hash code **/
+  /**
+   * Precomputed hash code. Hash/equality is based on repository and pkgName. Note that due to
+   * interning, x.equals(y) <=> x==y.
+   **/
   private final int hashCode;
 
   private PackageIdentifier(RepositoryName repository, PathFragment pkgName) {