fix(Exact): grammar

source/exact.d.ts

@@ -1,15 +1,15 @@
 import type {KeysOfUnion} from './internal';
 
 /**
-Extract the element of an array that also works for array union.
-If T is not an array, returns never.
-This creates a type-safe way to access the element type of unknown type.
+Extracts the element of an array that also works for array union.
+Returns `never` if T is not an array.
+It creates a type-safe way to access the element type of `unknown` type.
 */
 type ArrayElement<T> = T extends unknown[] ? T[0] : never;
 
 /**
-Extract the object field type if T is an object and K is a key of T, otherwise returns never.
-This creates a type-safe way to access the key-value of unknown type.
+Extracts the object field type if T is an object and K is a key of T, returns `never` otherwise.
+It creates a type-safe way to access the member type of `unknown` type.
 */
 type ObjectValue<T, K> = K extends keyof T ? T[K] : never;