Fix names of UTF-16 surrogate character test fixture constants

- Different, simpler solution from PR 1326

Author: garydgregory

src/changes/changes.xml

@@ -69,6 +69,8 @@ The <action> type attribute can be add,update,fix,remove.
     <action                   type="fix" dev="ggregory" due-to="Gary Gregory">Make Failable.accept(*) null-safe.</action>
     <action                   type="fix" dev="ggregory" due-to="maxxedev, Piotr P. Karwasz, Gary Gregory">Improve container detection by mimicking systemd #1323.</action>
     <action                   type="fix" dev="ggregory" due-to="Gary Gregory">Make LangCollectors.collect(...) null-safe.</action>
+    <action                   type="fix" dev="ggregory" due-to="Gary Gregory">Make LangCollectors.collect(...) null-safe.</action>
+    <action                   type="fix" dev="ggregory" due-to="IBue, Gary Gregory">Fix names of UTF-16 surrogate character test fixture constants, see also #1326.</action>
     <!-- ADD -->
     <action                   type="add" dev="ggregory" due-to="Gary Gregory">Add Strings and refactor StringUtils.</action>
     <action issue="LANG-1747" type="add" dev="ggregory" due-to="Oliver B. Fischer, Gary Gregory">Add StopWatch.run([Failable]Runnable) and get([Failable]Supplier).</action>