Merge pull request #24 from mikebobadilla/master

grammar

Author: horike37

lib/activity.js

@@ -94,7 +94,7 @@ module.exports = {
     const activity = name || this.options.name;
     if (this.serverless.service.stepFunctions.activities.indexOf(activity) < 0) {
       const errorMessage = [
-        `Activity "${activity}" is not exists in serverless.yml`,
+        `Activity "${activity}" does not exist in serverless.yml`,
       ].join('');
       throw new this.serverless.classes.Error(errorMessage);
     }

lib/dataProcessing.js

@@ -65,7 +65,7 @@ module.exports = {
     if (typeof this.serverless.service.stepFunctions.stateMachines[this.options.name]
       === 'undefined') {
       const errorMessage = [
-        `Step function "${this.options.name}" is not exists`,
+        `Step function "${this.options.name}" does not exist`,
       ].join('');
       throw new this.serverless.classes.Error(errorMessage);
     }