address ningxin's comments

Author: mingmingtasd

index.bs

@@ -2819,7 +2819,7 @@ partial interface MLGraphBuilder {
 </div>
 
 ### gelu ### {#api-mlgraphbuilder-gelu-method}
-Compute the <a href="https://en.wikipedia.org/wiki/Rectifier_(neural_networks)#Gaussian-error_linear_unit_(GELU)">gaussian error linear unit activation function</a> of the input tensor. The calculation follows the expression `0.5 * x * (1.0 + erf(x / sqrt(2)))`.
+Compute the <a href="https://en.wikipedia.org/wiki/Rectifier_(neural_networks)#Gaussian-error_linear_unit_(GELU)">gaussian error linear unit function</a> (GELU) of the input tensor. The calculation follows the expression `0.5 * x * (1 + erf(x / sqrt(2)))`.
 
 <script type=idl>
 partial interface MLGraphBuilder {
@@ -2844,11 +2844,7 @@ partial interface MLGraphBuilder {
                    builder.erf(
                        builder.div(
                            x,
-                           builder.sqrt(builder.constant(2))
-                       )
-                   )
-               )
-          )
+                           builder.sqrt(builder.constant(2))))));
     </pre>
   </details>
 </div>