Fix indenting issue after a double digit list block using a tab (#134)

src/Markdig.Tests/TestPlayParser.cs

@@ -12,6 +12,18 @@ namespace Markdig.Tests
     [TestFixture]
     public class TestPlayParser
     {
+        [Test]
+        public void TestListBug2()
+        {
+            TestParser.TestSpec("10.\t*test* – test\n\n11.\t__test__ test\n\n", @"<ol start=""10"">
+<li><p><em>test</em> – test</p>
+</li>
+<li><p><strong>test</strong> test</p>
+</li>
+</ol>
+");
+        }
+
         [Test]
         public void TestSimple()
         {

src/Markdig/Parsers/ListBlockParser.cs

@@ -230,17 +230,16 @@ namespace Markdig.Parsers
                     return BlockState.None;
                 }
 
-                // We require at least one char
-                state.NextColumn();
-
                 // Parse the following indent
                 state.RestartIndent();
                 var columnBeforeIndent = state.Column;
                 state.ParseIndent();
 
-                if (state.IsCodeIndent)
+                // We expect at most 4 columns after
+                // If we have more, we reset the position
+                if (state.Indent > 4)
                 {
-                    state.GoToColumn(columnBeforeIndent);
+                    state.GoToColumn(columnBeforeIndent + 1);
                 }
 
                 // Number of spaces required for the following content to be part of this list item