Silence JavaDoc error

JavaDoc is proposterously strict on what HTML it accepts. It's posssible
to drop it in the POM, but sonatype enforces the strict javalint
requirements, so the package won't be able to be published without the
change :/

Author: PerilousApricot

src/main/java/edu/vanderbilt/accre/laurelin/spark_ttree/SlimTBranch.java

@@ -386,8 +386,8 @@ private void initializePayload(ROOTFile tmpFile) throws IOException {
      * CMS NANOAOD file ends up being ~3MByte, so it's not so bad to have it
      * in-memory, it's repeatedly transmitting the 3MByte 10s of thousands of
      * times.
-     * <br />
-     * Instead of jumping through hoops to make the in-memory size really
+     *
+     * <p>Instead of jumping through hoops to make the in-memory size really
      * compact, we can instead override Java's serialization mechanism to
      * provide an alternate representation used for (de-)serialization. The
      * SerializeStorage class is what's actually transmitted over the wire.