- Coding style fixes

test=develop

paddle/fluid/operators/math/blas_impl.h

@@ -487,7 +487,6 @@ void Blas<platform::CPUDeviceContext>::SCAL(int n, const T a, T *x) const {
 #endif
 }
 
-
 template <>
 template <typename T>
 T Blas<platform::CPUDeviceContext>::ASUM(int n, T *x, int inc) const {
@@ -495,7 +494,7 @@ T Blas<platform::CPUDeviceContext>::ASUM(int n, T *x, int inc) const {
 #ifdef PADDLE_WITH_MKLML
   sum = CBlas<T>::ASUM(n, x, inc);
 #else
-  //TODO(jczaja): check if openblas does provide cblas_sasum/cblas_dasum
+  // TODO(jczaja): check if openblas does provide cblas_sasum/cblas_dasum
   for (int c = 0; c < n; ++c) {
     sum += x[c];
   }
@@ -503,7 +502,6 @@ T Blas<platform::CPUDeviceContext>::ASUM(int n, T *x, int inc) const {
   return sum;
 }
 
-
 template <>
 template <typename T>
 void Blas<platform::CPUDeviceContext>::GEMV(bool trans_a, int M, int N, T alpha,