Fix comment formatting from GJF causing an error in [G's] Error Prone…

… checks.

nullaway/src/main/java/com/uber/nullaway/LibraryModels.java

@@ -84,8 +84,9 @@ public interface LibraryModels {
    * Get (method, parameter) pairs that cause the method to return <code>null</code> when passed
    * <code>null</code> on that parameter.
    *
-   * <p>This is equivalent to annotating a method with <code>
-   * @Contract("!null -&gt; !null") @Nullable</code> or similar.
+   * <p>This is equivalent to annotating a method with a contract like:
+   *
+   * <pre><code>@Contract("!null -&gt; !null") @Nullable</code></pre>
    *
    * @return map from the names of null-in-implies-null out methods to the indexes of the arguments
    *     that determine nullness of the return.