Java: Update qhelp as per review.

Author: aschackmull

java/ql/src/Likely Bugs/Concurrency/DoubleCheckedLockingShared.qhelp

@@ -68,9 +68,9 @@ variable can be used to avoid reading the field more times than neccessary.
 
 <p>
 As a final note, it is possible to use double-checked locking correctly without
-<code>volatile</code> if the constructed object is immutable in the sense that
-all its fields are declared <code>final</code> and the double-checked field is
-read exactly once outside the synchronized block.
+<code>volatile</code> if the object you construct is immutable. That is, the
+object declares all fields as <code>final</code>, and the double-checked field
+is read exactly once outside the synchronized block.
 </p>
 <p>
 Given that all fields in <code>MyImmutableObject</code> are declared
@@ -101,9 +101,11 @@ Java Language Specification:
 Wikipedia: <a href="https://en.wikipedia.org/wiki/Double-checked_locking">Double-checked locking</a>.
 </li>
 <li>
+Aleksey Shipilëv:
 <a href="https://shipilev.net/blog/2014/safe-public-construction/">Safe Publication and Safe Initialization in Java</a>.
 </li>
 <li>
+Aleksey Shipilëv:
 <a href="https://shipilev.net/blog/2016/close-encounters-of-jmm-kind/">Close Encounters of The Java Memory Model Kind</a>.
 </li>