add DlaHelper for tests and correct minor typos

src/UglyToad.PdfPig.Tests/Dla/DlaHelper.cs

@@ -0,0 +1,20 @@
+namespace UglyToad.PdfPig.Tests.Dla
+{
+    using System;
+    using System.IO;
+
+    internal static class DlaHelper
+    {
+        public static string GetDocumentPath(string name, bool isPdf = true)
+        {
+            var documentFolder = Path.GetFullPath(Path.Combine(AppDomain.CurrentDomain.BaseDirectory, "..", "..", "..", "Dla", "Documents"));
+
+            if (!name.EndsWith(".pdf") && isPdf)
+            {
+                name += ".pdf";
+            }
+
+            return Path.Combine(documentFolder, name);
+        }
+    }
+}

src/UglyToad.PdfPig.Tests/Dla/KdTreeTests.cs

@@ -6727,7 +6727,6 @@
 
             // root -> right side -> right side
             Assert.Null(kdTree.Root.RightChild.RightChild);
-
         }
 
         [Theory]

src/UglyToad.PdfPig.Tests/Dla/MathExtensionsTests.cs

@@ -183,7 +183,7 @@
             var dataFloat = data.Select(x => (float)x);
             Assert.Equal((float)expected, dataFloat.Mode(), PreciseDoubleComparer);
         }
-        
+
         [Theory]
         [MemberData(nameof(ModeDataNaN))]
         public void ModeNaN(double[] data)