HidePrefix and PrefixOnly are still effective

Author: Tanya-Solyanik

xml/System.Windows.Forms/TextFormatFlags.xml

@@ -183,7 +183,7 @@
       </ReturnValue>
       <MemberValue>1048576</MemberValue>
       <Docs>
-        <summary>A legacy value that has no effect. It ignored the ampersand (&amp;) prefix character in the text, so that the letter that followed was not underlined, but other mnemonic-prefix characters were still processed.</summary>
+        <summary>It ignored the ampersand (&amp;) prefix character in the text, so that the letter that followed was not underlined, but other mnemonic-prefix characters were still processed.</summary>
       </Docs>
     </Member>
     <Member MemberName="HorizontalCenter">
@@ -414,7 +414,7 @@
       </ReturnValue>
       <MemberValue>2097152</MemberValue>
       <Docs>
-        <summary>A legacy value that has no effect. It drew only an underline at the position of the character following the ampersand (&amp;) prefix character, and did not draw any other characters in the string.</summary>
+        <summary>It drew only an underline at the position of the character following the ampersand (&amp;) prefix character, and did not draw any other characters in the string.</summary>
       </Docs>
     </Member>
     <Member MemberName="PreserveGraphicsClipping">