XmlWriter reverts to XML 1.0.
Character encodings that are not valid in XML 1.0 are instead written using C-style escapes
diff --git a/projects/SelfTest/Baselines/xml.sw.approved.txt b/projects/SelfTest/Baselines/xml.sw.approved.txt
index a9076d2..b763821 100644
--- a/projects/SelfTest/Baselines/xml.sw.approved.txt
+++ b/projects/SelfTest/Baselines/xml.sw.approved.txt
@@ -1,4 +1,4 @@
-<?xml version="1.1" encoding="UTF-8"?>
+<?xml version="1.0" encoding="UTF-8"?>
 <Catch name="<exe-name>">
   <Group name="<exe-name>">
     <TestCase name="# A test name that starts with a #">
@@ -8600,10 +8600,10 @@
       <Section name="string with control char (1)">
         <Expression success="true" type="REQUIRE" filename="projects/<exe-name>/MiscTests.cpp" >
           <Original>
-            encode( "[\x01]" ) == "[&amp;#x01;]"
+            encode( "[\x01]" ) == "[\\x01]"
           </Original>
           <Expanded>
-            "[&amp;#x01;]" == "[&amp;#x01;]"
+            "[\x01]" == "[\x01]"
           </Expanded>
         </Expression>
         <OverallResults successes="1" failures="0" expectedFailures="0"/>
@@ -8611,10 +8611,10 @@
       <Section name="string with control char (x7F)">
         <Expression success="true" type="REQUIRE" filename="projects/<exe-name>/MiscTests.cpp" >
           <Original>
-            encode( "[\x7F]" ) == "[&amp;#x7F;]"
+            encode( "[\x7F]" ) == "[\\x7F]"
           </Original>
           <Expanded>
-            "[&amp;#x7F;]" == "[&amp;#x7F;]"
+            "[\x7F]" == "[\x7F]"
           </Expanded>
         </Expression>
         <OverallResults successes="1" failures="0" expectedFailures="0"/>