added a distinction between effects of these flags on DrawText and MeasureText

Author: Tanya-Solyanik

xml/System.Windows.Forms/TextFormatFlags.xml

@@ -99,7 +99,7 @@
       </ReturnValue>
       <MemberValue>32768</MemberValue>
       <Docs>
-        <summary>Removes the end of trimmed lines, and replaces them with an ellipsis. The string is not modified unless the <see cref="F:System.Windows.Forms.TextFormatFlags.ModifyString" /> flag is specified. Compare with <see cref="F:System.Windows.Forms.TextFormatFlags.PathEllipsis" /> and <see cref="F:System.Windows.Forms.TextFormatFlags.WordEllipsis" />.</summary>
+        <summary>Removes the end of trimmed lines, and replaces them with an ellipsis. When used to draw text by `TextRenderer`, the string is not modified unless the <see cref="F:System.Windows.Forms.TextFormatFlags.ModifyString" /> flag is specified. Compare with <see cref="F:System.Windows.Forms.TextFormatFlags.PathEllipsis" /> and <see cref="F:System.Windows.Forms.TextFormatFlags.WordEllipsis" />.</summary>
       </Docs>
     </Member>
     <Member MemberName="ExpandTabs">
@@ -288,7 +288,7 @@
       </ReturnValue>
       <MemberValue>65536</MemberValue>
       <Docs>
-        <summary>Has no effect on the drawn text. Modifies the specified string parameter to match the displayed text if ellipsis are shown. This value has no effect unless <see cref="F:System.Windows.Forms.TextFormatFlags.EndEllipsis" /> or <see cref="F:System.Windows.Forms.TextFormatFlags.PathEllipsis" />is specified.</summary>
+        <summary>Has no effect on the drawn text or text measurements. When used to draw text by `TextRenderer`, modifies the specified string parameter to match the displayed text if ellipsis are shown. This value has no effect unless <see cref="F:System.Windows.Forms.TextFormatFlags.EndEllipsis" /> or <see cref="F:System.Windows.Forms.TextFormatFlags.PathEllipsis" />is specified.</summary>
       </Docs>
     </Member>
     <Member MemberName="NoClipping">
@@ -393,7 +393,7 @@
       </ReturnValue>
       <MemberValue>16384</MemberValue>
       <Docs>
-        <summary>Removes the center of trimmed lines and replaces it with an ellipsis. The string is not modified unless the <see cref="F:System.Windows.Forms.TextFormatFlags.ModifyString" /> flag is specified. Compare with <see cref="F:System.Windows.Forms.TextFormatFlags.EndEllipsis" /> and <see cref="F:System.Windows.Forms.TextFormatFlags.WordEllipsis" />.</summary>
+        <summary>Removes the center of trimmed lines and replaces it with an ellipsis. When used to draw text by `TextRenderer`, the string is not modified unless the <see cref="F:System.Windows.Forms.TextFormatFlags.ModifyString" /> flag is specified. Compare with <see cref="F:System.Windows.Forms.TextFormatFlags.EndEllipsis" /> and <see cref="F:System.Windows.Forms.TextFormatFlags.WordEllipsis" />.</summary>
       </Docs>
     </Member>
     <Member MemberName="PrefixOnly">