Lint changes from William Rucklidge.

Change-Id: I4c34caa57c48c97df213d6fb44a1a2534a953f0f

docs/source/nnls_modeling.rst

@@ -1152,7 +1152,7 @@ Instances
 
    When using homogeneous vectors it is useful to only make updates
    orthogonal to that :math:`n`-vector defining the homogeneous
-   vector [HartleyZisserman]_. One way to do this is to let :math:`\Delta x` 
+   vector [HartleyZisserman]_. One way to do this is to let :math:`\Delta x`
    be a :math:`n-1` dimensional vector and define :math:`\boxplus` to be
 
     .. math:: \boxplus(x, \Delta x) = \left[ \frac{\sin\left(0.5 |\Delta x|\right)}{|\Delta x|} \Delta x, \cos(0.5 |\Delta x|) \right] * x
@@ -1160,7 +1160,7 @@ Instances
    The multiplication between the two vectors on the right hand side
    is defined as an operator which applies the update orthogonal to
    :math:`x` to remain on the sphere. Note, it is assumed that
-   last element of :math:`x` is the scalar component of the homogeneous 
+   last element of :math:`x` is the scalar component of the homogeneous
    vector.
 
 

internal/ceres/local_parameterization.cc

@@ -222,7 +222,7 @@ bool HomogeneousVectorParameterization::Plus(const double* x_ptr,
   // Apply the delta update to remain on the unit sphere. See section A6.9.3
   // on page 625 of Hartley & Zisserman (2nd Edition) for a detailed
   // description.
-  x_plus_delta = x.norm() * (y -  v * (beta *(v.transpose() * y)));
+  x_plus_delta = x.norm() * (y -  v * (beta * (v.transpose() * y)));
 
   return true;
 }