Update assignment.md

A typo and improvement tom English
diff --git a/erpnext/docs/user/manual/en/using-erpnext/assignment.md b/erpnext/docs/user/manual/en/using-erpnext/assignment.md
index 72b03b7..e78a112 100644
--- a/erpnext/docs/user/manual/en/using-erpnext/assignment.md
+++ b/erpnext/docs/user/manual/en/using-erpnext/assignment.md
@@ -22,7 +22,7 @@
 
 ####ToDo List of Assignee
 
-This transaction will appear in the To-do list of the ser in “Todo” section.
+This transaction will appear in the To-do list of the user in “Todo” section.
 
 <img class="screenshot" alt="Assign" src="{{docs_base_url}}/assets/img/collaboration-tools/assign-3.png">
 
@@ -32,6 +32,6 @@
 
 <img class="screenshot" alt="Assign" src="{{docs_base_url}}/assets/img/collaboration-tools/assign-4.png">
 
-Once assignment is set as completed, Status of its ToDo record will be set as Closed.
+Once assignment is set as completed, the Status of its ToDo record will be set as Closed.
 
 {next}