Update branch from master after trailing whitespaces and tabs removal

Cartesian_kernel/include/CGAL/Cartesian/function_objects.h

@@ -526,6 +526,39 @@ namespace CartesianKernelFunctors {
     }
   };
 
+  template <typename K>
+  class Compare_signed_distance_to_line_2
+  {
+    typedef typename K::Point_2   Point_2;
+    typedef typename K::Line_2    Line_2;
+    typedef typename K::Equal_2   Equal_2;
+    typedef typename K::Less_signed_distance_to_line_2 Less_signed_distance_to_line_2;
+    
+  public:
+    typedef typename K::Comparison_result     result_type;
+
+    result_type
+    operator()(const Point_2& a, const Point_2& b,
+               const Point_2& c, const Point_2& d) const
+    {
+      CGAL_kernel_precondition_code(Equal_2 equal;)
+          CGAL_kernel_precondition(! equal(a,b));
+      return cmp_signed_dist_to_lineC2( a.x(), a.y(),
+                                        b.x(), b.y(),
+                                        c.x(), c.y(),
+                                        d.x(), d.y());
+    }
+
+    result_type
+    operator()(const Line_2& l, const Point_2& p, const Point_2& q) const
+    {
+      Less_signed_distance_to_line_2 less = K().less_signed_distance_to_line_2_object();
+      if (less(l, p, q)) return SMALLER;
+      if (less(l, q, p)) return LARGER;
+      return EQUAL;
+    }
+  };
+
   template <typename K>
   class Compare_squared_radius_3
   {
@@ -3884,7 +3917,7 @@ namespace CartesianKernelFunctors {
     }
   };
 
-  // TODO ...
+
   template <typename K>
   class Less_signed_distance_to_line_2
   {