fix new lint errors

1 files changed, 7 insertions, 6 deletions

diff --git a/lib/waterfall.js b/lib/waterfall.js
index 62bbdfe..9478bd9 100644
--- a/lib/waterfall.js
+++ b/lib/waterfall.js
@@ -22,6 +22,7 @@ import onlyOnce from './internal/onlyOnce';
  * @param {Function} [callback] - An optional callback to run once all the
  * functions have completed. This will be passed the results of the last task's
  * callback. Invoked with (err, [results]).
+ * @returns undefined
  * @example
  *
  * async.waterfall([
@@ -60,20 +61,20 @@ import onlyOnce from './internal/onlyOnce';
  *     callback(null, 'done');
  * }
  */
-export default  function(tasks, cb) {
-    cb = once(cb || noop);
-    if (!isArray(tasks)) return cb(new Error('First argument to waterfall must be an array of functions'));
-    if (!tasks.length) return cb();
+export default  function(tasks, callback) {
+    callback = once(callback || noop);
+    if (!isArray(tasks)) return callback(new Error('First argument to waterfall must be an array of functions'));
+    if (!tasks.length) return callback();
     var taskIndex = 0;
 
     function nextTask(args) {
         if (taskIndex === tasks.length) {
-            return cb.apply(null, [null].concat(args));
+            return callback.apply(null, [null].concat(args));
         }
 
         var taskCallback = onlyOnce(rest(function(err, args) {
             if (err) {
-                return cb.apply(null, [err].concat(args));
+                return callback.apply(null, [err].concat(args));
             }
             nextTask(args);
         }));