Apply suggestions from code review

Co-authored-by: Carlos Sánchez López <[email protected]>

Author: eiriktsarpalis

xml/System.Collections.Frozen/FrozenSet`1.xml

@@ -963,15 +963,16 @@
       </Parameters>
       <Docs>
         <typeparam name="TAlternate">The alternate type of a key for performing lookups.</typeparam>
-        <param name="lookup">The created lookup instance when the method returns true, or a default instance that should not be used if the method returns false.</param>
+        <param name="lookup">The created lookup instance when the method returns <see langword="true" />, or a default instance that should not be used if the method returns <see langword="false" />.</param>
         <summary>
           Gets an instance of a type that may be used to perform operations on a <see cref="T:System.Collections.Frozen.FrozenSet`1"/>
           using a <typeparamref name="TAlternate"/> instead of a <typeparamref name="T"/>.
         </summary>
-        <returns>true if a lookup could be created; otherwise, false.</returns>
+        <returns>
+          <see langword="true" /> if a lookup could be created; otherwise, <see langword="false" />.</returns>
         <remarks>
           This instance must be using a comparer that implements <see cref="T:System.Collections.Generic.IAlternateEqualityComparer`2"/> with
-          <typeparamref name="TAlternate"/> and <typeparamref name="T"/>. If it doesn't, the method will return false.
+          <typeparamref name="TAlternate"/> and <typeparamref name="T"/>. If it doesn't, the method will return <see langword="false" />.
         </remarks>
       </Docs>
     </Member>