Remove empty IHighlighter2 interface.

src/Libraries/AvalonEdit/ICSharpCode.AvalonEdit/Highlighting/IHighlighter.cs

@@ -32,9 +32,4 @@ namespace ICSharpCode.AvalonEdit.Highlighting
 		/// <returns>A <see cref="HighlightedLine"/> line object that represents the highlighted sections.</returns>
 		HighlightedLine HighlightLine(int lineNumber);
 	}
-	
-	public interface IHighlighter2
-	{
-		
-	}
 }

src/Libraries/AvalonEdit/ICSharpCode.AvalonEdit/Snippets/SnippetCaretElement.cs

@@ -27,9 +27,9 @@ namespace ICSharpCode.AvalonEdit.Snippets
 		/// <summary>
 		/// Creates a new SnippetCaretElement.
 		/// </summary>
-		/// <param name="setCaretOnlyIfSelectionExists">
+		/// <param name="setCaretOnlyIfTextIsSelected">
 		/// If set to true, the caret is set only when some text was selected.
-		/// This is useful 
+		/// This is useful when both SnippetCaretElement and SnippetSelectionElement are used in the same snippet.
 		/// </param>
 		public SnippetCaretElement(bool setCaretOnlyIfTextIsSelected)
 		{