Make javadoc <p> style guide compliant

This led to confusion for an open source contributor about how to format
code. We don't want to be like, "do as I say, not as I do."

https://google.github.io/styleguide/javaguide.html#s7.1.2-javadoc-paragraphs
-------------
Created by MOE: https://github.com/google/moe
MOE_MIGRATED_REVID=122589700

java/google/registry/model/eppcommon/AuthInfo.java

@@ -29,8 +29,8 @@ import javax.xml.bind.annotation.adapters.XmlJavaTypeAdapter;
 
 /**
  * The "authInfoType" complex type.
- * <p>
- * RFCs 5731 and 5732 define this almost identically up to the namespace.
+ *
+ * <p>RFCs 5731 and 5732 define this almost identically up to the namespace.
  */
 @XmlTransient
 public abstract class AuthInfo extends ImmutableObject {