update comments

src/UglyToad.PdfPig.Core/PdfSubpath.cs

@@ -176,7 +176,7 @@
         /// </summary>
         public void Rectangle(double x, double y, double width, double height)
         {
-                                                // is equivalent to
+                                                // is equivalent to:
             MoveTo(x, y);                       // x y m
             LineTo(x + width, y);               // (x + width) y l
             LineTo(x + width, y + height);      // (x + width) (y + height) l

src/UglyToad.PdfPig/Graphics/IOperationContext.cs

@@ -89,7 +89,6 @@
         /// <summary>
         /// Close the current subpath.
         /// </summary>
-        /// <returns></returns>
         PdfPoint CloseSubpath();
 
         /// <summary>