Fix typos (#736)

* Fix typos

* Update api.md

Author: Alex-Sokolov

docs/en/api.md

@@ -52,15 +52,15 @@ const store = new Vuex.Store({ ...options })
 
     ```
     state,     // will be module local state if defined in a module.
-    getters,   // same as store.getters
+    getters    // same as store.getters
     ```
 
     Specific when defined in a module
 
     ```
     state,       // will be module local state if defined in a module.
     getters,     // module local getters of the current module
-    rootState    // global state
+    rootState,   // global state
     rootGetters  // all getters
     ```