polish two error message, test=develop (#24778)

paddle/fluid/operators/sequence_ops/sequence_softmax_cudnn_op.cu.cc

@@ -33,12 +33,17 @@ class SequenceSoftmaxCUDNNKernel : public framework::OpKernel<T> {
     auto& dims = x->dims();
 
     const size_t level = lod.size() - 1;
-    PADDLE_ENFORCE_EQ(dims[0], static_cast<int64_t>(lod[level].back()),
-                      "The first dimension of Input(X) should be equal to the "
-                      "sum of all sequences' lengths.");
+    PADDLE_ENFORCE_EQ(
+        dims[0], static_cast<int64_t>(lod[level].back()),
+        platform::errors::InvalidArgument(
+            "The first dimension of Input(X) should be equal to the sum of all "
+            "sequences' lengths. But received first dimension of Input(X) is "
+            "%d, the sum of all sequences' lengths is %d.",
+            dims[0], static_cast<int64_t>(lod[level].back())));
     PADDLE_ENFORCE_EQ(dims[0], x->numel(),
+                      platform::errors::InvalidArgument(
                           "The width of each timestep in Input(X) of "
-                      "SequenceSoftmaxOp should be 1.");
+                          "SequenceSoftmaxOp should be 1."));
 
     out->mutable_data<T>(ctx.GetPlace());
     for (int i = 0; i < static_cast<int>(lod[level].size()) - 1; ++i) {