Diffs not accurate in some corner cases about java-almanac HOT 5 CLOSED

$ ./java -version
openjdk version "11.0.2" 2019-01-15
OpenJDK Runtime Environment 18.9 (build 11.0.2+9)
OpenJDK 64-Bit Server VM 18.9 (build 11.0.2+9, mixed mode)

$ ./javap java.lang.WeakPairMap.Pair.Lookup
Compiled from "WeakPairMap.java"
public final class java.lang.WeakPairMap$Pair$Lookup<K1, K2> implements java.lang.WeakPairMap$Pair<K1, K2> {
  java.lang.WeakPairMap$Pair$Lookup(K1, K2);
  public K1 first();
  public K2 second();
  public int hashCode();
  public boolean equals(java.lang.Object);
}

$ ./javap java.lang.WeakPairMap.Pair.Weak
Compiled from "WeakPairMap.java"
public final class java.lang.WeakPairMap$Pair$Weak<K1, K2> extends java.lang.WeakPairMap$WeakRefPeer<K1> implements java.lang.WeakPairMap$Pair<K1, K2> {
  java.lang.WeakPairMap$Pair$Weak(K1, K2, java.lang.ref.ReferenceQueue<java.lang.Object>);
  java.lang.WeakPairMap$Pair$Weak<?, ?> weakPair();
  public K1 first();
  public K2 second();
  public int hashCode();
  public boolean equals(java.lang.Object);
}