Rephrase comments to be tense consisten. (#2995)

src/ngraph/builder/reshape.hpp

@@ -29,7 +29,7 @@ namespace ngraph
     {
         /// \brief      Change shape of input tensor.
         ///
-        /// \param[in]  node   The node which shape will be used as input to Reshape.
+        /// \param[in]  node   The node producing the tensor to be reshaped.
         /// \param[in]  shape  The new shape for input tensor.
         ///
         /// \return     The node representing a Reshape operation.
@@ -57,7 +57,7 @@ namespace ngraph
         /// \param node The tensor to be flattened.
         /// \param axis The axis dividing shape.
         ///
-        /// \return The new node being a 2D matrix representing flattened input node.
+        /// \return The new node will be a 2D matrix representing the flattened input node.
         std::shared_ptr<Node> flatten(const std::shared_ptr<Node>& node, int axis);
     } // namespace  builder
 } // namespace  ngraph

src/ngraph/op/util/reshape.hpp

@@ -32,7 +32,7 @@ namespace ngraph
         {
             /// \brief      Change shape of input tensor.
             ///
-            /// \param[in]  node   The node which shape will be used as input to Reshape.
+            /// \param[in]  node   The node producing the tensor to be reshaped.
             /// \param[in]  shape  The new shape for input tensor.
             ///
             /// \return     The node representing a Reshape operation.
@@ -70,7 +70,7 @@ namespace ngraph
             /// \param node The tensor to be flattened.
             /// \param axis The axis dividing shape.
             ///
-            /// \return The new node being a 2D matrix representing flattened input node.
+            /// \return The new node will be a 2D matrix representing the flattened input node.
             std::shared_ptr<ngraph::Node> flatten(const std::shared_ptr<ngraph::Node>& node,
                                                   int axis)
             {