Fix operator() signature in several sections of the documentation
Change-Id: I73f9d150a738f7b136fbc1f98fc60b0f306bd7f9
diff --git a/include/ceres/numeric_diff_functor.h b/include/ceres/numeric_diff_functor.h
index 593c371..039e1a1 100644
--- a/include/ceres/numeric_diff_functor.h
+++ b/include/ceres/numeric_diff_functor.h
@@ -71,11 +71,11 @@
// }
//
// template <typename T>
-// bool operator(const T* rotation,
-// const T* translation,
-// const T* intrinsics,
-// const T* point,
-// T* residuals) const {
+// bool operator()(const T* rotation,
+// const T* translation,
+// const T* intrinsics,
+// const T* point,
+// T* residuals) const {
// T transformed_point[3];
// RotateAndTranslatePoint(rotation, translation, point, transformed_point);
// return (*intrinsic_projection_)(intrinsics, transformed_point, residual);