fixing the grammar in documentation (#1756)

Author: sauravazad

docs/v3/scripts/async.js

@@ -1606,7 +1606,7 @@
      * @param {AsyncFunction} iteratee - A function applied to each item in the
      * array to produce the next step in the reduction.
      * The `iteratee` should complete with the next state of the reduction.
-     * If the iteratee complete with an error, the reduction is stopped and the
+     * If the iteratee completes with an error, the reduction is stopped and the
      * main `callback` is immediately called with the error.
      * Invoked with (memo, item, callback).
      * @param {Function} [callback] - A callback which is called after all the
@@ -3441,7 +3441,7 @@
      * @param {AsyncFunction} iteratee - A function applied to each item in the
      * array to produce the next step in the reduction.
      * The `iteratee` should complete with the next state of the reduction.
-     * If the iteratee complete with an error, the reduction is stopped and the
+     * If the iteratee completes with an error, the reduction is stopped and the
      * main `callback` is immediately called with the error.
      * Invoked with (memo, item, callback).
      * @param {Function} [callback] - A callback which is called after all the

lib/reduce.js

@@ -26,7 +26,7 @@ import awaitify from './internal/awaitify'
  * @param {AsyncFunction} iteratee - A function applied to each item in the
  * array to produce the next step in the reduction.
  * The `iteratee` should complete with the next state of the reduction.
- * If the iteratee complete with an error, the reduction is stopped and the
+ * If the iteratee completes with an error, the reduction is stopped and the
  * main `callback` is immediately called with the error.
  * Invoked with (memo, item, callback).
  * @param {Function} [callback] - A callback which is called after all the
@@ -55,4 +55,3 @@ function reduce(coll, memo, iteratee, callback) {
     }, err => callback(err, memo));
 }
 export default awaitify(reduce, 4)
-

lib/reduceRight.js

@@ -15,7 +15,7 @@ import reduce from './reduce';
  * @param {AsyncFunction} iteratee - A function applied to each item in the
  * array to produce the next step in the reduction.
  * The `iteratee` should complete with the next state of the reduction.
- * If the iteratee complete with an error, the reduction is stopped and the
+ * If the iteratee completes with an error, the reduction is stopped and the
  * main `callback` is immediately called with the error.
  * Invoked with (memo, item, callback).
  * @param {Function} [callback] - A callback which is called after all the