fix a caret navigation bug introduced by 35a81d3e

src/Libraries/AvalonEdit/ICSharpCode.AvalonEdit.Tests/Utils/CaretNavigationTests.cs

@@ -129,5 +129,13 @@ namespace ICSharpCode.AvalonEdit.Utils
 			Assert.AreEqual(6, GetNextCaretStop(str, 1, CaretPositioningMode.Normal));
 			Assert.AreEqual(1, GetPrevCaretStop(str, 6, CaretPositioningMode.Normal));
 		}
+		
+		[Test]
+		public void SingleClosingBraceAtLineEnd()
+		{
+			string str = "\t\t}";
+			Assert.AreEqual(2, GetNextCaretStop(str, 1, CaretPositioningMode.WordStart));
+			Assert.AreEqual(-1, GetPrevCaretStop(str, 1, CaretPositioningMode.WordStart));
+		}
 	}
 }

src/Libraries/AvalonEdit/ICSharpCode.AvalonEdit/Document/TextUtilities.cs

@@ -225,6 +225,7 @@ namespace ICSharpCode.AvalonEdit.Document
 				case UnicodeCategory.SpaceSeparator:
 				case UnicodeCategory.LineSeparator:
 				case UnicodeCategory.ParagraphSeparator:
+				case UnicodeCategory.Control:
 					return CharacterClass.Whitespace;
 				case UnicodeCategory.UppercaseLetter:
 				case UnicodeCategory.LowercaseLetter: