Fixing ellipsis extension method

--HG--
branch : 1.x

src/Orchard.Tests/Utility/Extensions/StringExtensionsTests.cs

@@ -31,11 +31,29 @@ namespace Orchard.Tests.Utility.Extensions {
             Assert.That(aCamel.CamelFriendly(), Is.StringMatching(""));
         }
 
+        [Test]
+        public void Ellipsize_ShouldTuncateToTheExactNumber() {
+            const string toEllipsize = "Lorem ipsum";
+            Assert.That(toEllipsize.Ellipsize(2, ""), Is.StringMatching("Lo"));
+            Assert.That(toEllipsize.Ellipsize(1, ""), Is.StringMatching("L"));
+            Assert.That(toEllipsize.Ellipsize(0, ""), Is.StringMatching(""));
+        }
+        
+        [Test]
+        public void Ellipsize_TruncatedToWordBoundary() {
+            const string toEllipsize = "Lorem ipsum";
+            Assert.That(toEllipsize.Ellipsize(8, ""), Is.StringMatching("Lorem"));
+            Assert.That(toEllipsize.Ellipsize(6, ""), Is.StringMatching("Lorem"));
+            Assert.That(toEllipsize.Ellipsize(5, ""), Is.StringMatching("Lorem"));
+            Assert.That(toEllipsize.Ellipsize(4, ""), Is.StringMatching(""));
+        }
+
         [Test]
         public void Ellipsize_LongStringTruncatedToNearestWord() {
             const string toEllipsize = "Lorem ipsum dolor sit amet, consectetur adipiscing elit. Maecenas sed purus quis purus orci aliquam.";
             Assert.That(toEllipsize.Ellipsize(45), Is.StringMatching("Lorem ipsum dolor sit amet, consectetur …"));
         }
+
         [Test]
         public void Ellipsize_ShortStringReturnedAsSame() {
             const string toEllipsize = "Lorem ipsum";

src/Orchard/Utility/Extensions/StringExtensions.cs

@@ -27,7 +27,7 @@ namespace Orchard.Utility.Extensions {
             if (characterCount < 0 || text.Length <= characterCount)
                 return text;
 
-            var trimmed = Regex.Replace(text.Substring(0, characterCount + 1), @"\s+\S*$", "") ;
+            var trimmed = Regex.Replace(text.Substring(0, characterCount), @"\s+\S*$", "") ;
 
             if(wordBoundary) {
                 trimmed = Regex.Replace(trimmed + ".", @"\W*\w*$", "");