Improvements based on the PR feedbacks

Author: maryamariyan

xml/System.Linq/Enumerable.xml

@@ -12612,8 +12612,8 @@ Only unique elements are returned.
         <typeparam name="TSecond">The type of the elements of the second input sequence.</typeparam>
         <param name="first">The first sequence to merge.</param>
         <param name="second">The second sequence to merge.</param>
-        <summary>Applies a specified function to the corresponding elements of two sequences, producing a sequence of value types with elements from both sequences.</summary>
-        <returns>An <see cref="T:System.Collections.Generic.IEnumerable`1" /> that contains merged value types with first elements taken from first sequence and second elements taken from second sequence.</returns>
+        <summary>Produces a sequence of tuples with elements from the two specified sequences.</summary>
+        <returns>A sequence of tuples with elements taken from the first and second sequences, in that order.</returns>
         <remarks>To be added.</remarks>
       </Docs>
     </Member>

xml/System.Linq/Queryable.xml

@@ -8301,8 +8301,8 @@
         <typeparam name="TSecond">The type of the elements of the second input sequence.</typeparam>
         <param name="source1">The first sequence to merge.</param>
         <param name="source2">The second sequence to merge.</param>
-        <summary>Merges two sequences by using the specified predicate function, producing a sequence of value types with elements from both sequences.</summary>
-        <returns>An <see cref="T:System.Linq.IQueryable`1" /> that contains merged value types with first elements taken from first sequence and second elements taken from second sequence.</returns>
+        <summary>Produces a sequence of tuples with elements from the two specified sequences.</summary>
+        <returns>A sequence of tuples with elements taken from the first and second sequences, in that order.</returns>
         <remarks>To be added.</remarks>
       </Docs>
     </Member>