update UG and DG

docs/DeveloperGuide.md

@@ -168,7 +168,7 @@ Grades
   + the grade is a value from 0 to 100, representing the percentage gotten in the test rounded to the nearest whole number
 * are an optional parameter
 
-Grades can be added and edited with the add and edit command with the prefix `g/`.
+Grades can be added and edited with the add and edit command with the prefix `g/` and `!g` respectively.
 
 Given below are example usages scenario of how adding grades behaves.
 * The user executes `add n/David … g/ca1: 100` command to add a new student with one grade, with the test name being `ca1` and the score attained `100`
@@ -188,7 +188,7 @@ Timeslots
     + For example, 'Saturday 4pm-6pm', 'Tuesday 2:30pm-4:30pm'
 * are an optional parameter
 
-Timeslots can be added and edited with the add and edit command with the prefix `t/`.
+Timeslots can be added and edited with the add and edit command with the prefix `t/` and `!t` respectively.
 
 Given below are example usages scenario of how adding timeslots behaves.
 * The user executes `add n/David … t/Saturday 4pm-6pm` command to add a new student with one timeslot on Saturdays 4pm-6pm
@@ -461,11 +461,11 @@ Priorities: High (must have) - `* * *`, Medium (nice to have) - `* *`, Low (unli
 
       Use case ends.
 * 2e. The given timeslots are invalid.
-    * 2d1. System shows an error message.
+    * 2e1. System shows an error message.
 
       Use case ends.
-* 2e. The student exists in the database already.
-    * 2e1. System shows an error message.
+* 2f. The student exists in the database already.
+    * 2f1. System shows an error message.
 
       Use case ends.
 
@@ -475,7 +475,9 @@ Priorities: High (must have) - `* * *`, Medium (nice to have) - `* *`, Low (unli
 1. User requests to list students.
 2. System displays the list of students.
 3. User requests to update a specific student information.
-4. System updates the student information.
+4. System displays the specific current data of the student.
+5. User update the current data of the student.
+6. System updates the student information.
 
    Use case ends.
 
@@ -485,22 +487,42 @@ Priorities: High (must have) - `* * *`, Medium (nice to have) - `* *`, Low (unli
     * 2a1. System shows an error message.
 
       Use case ends.
-* 3a. The given phone number is invalid.
+* 3a. The given index is invalid.
     * 3a1. System shows an error message.
 
       Use case ends.
-* 3b. The given email is invalid.
+* 3b. The given variable is invalid.
     * 3b1. System shows an error message.
 
       Use case ends.
-* 3c. The given grades are invalid.
+* 3c. The given variable is more than 1.
     * 3c1. System shows an error message.
 
       Use case ends.
-* 3d. The given index is invalid.
+* 3d. The given variable is less than 1.
     * 3d1. System shows an error message.
 
       Use case ends.
+* 5a. The given phone number is invalid.
+    * 5a1. System shows an error message.
+
+      Use case ends.
+* 5b. The given email is invalid.
+    * 5b1. System shows an error message.
+
+      Use case ends.
+* 5c. The given grades are invalid.
+    * 5c1. System shows an error message.
+
+      Use case ends.
+* 5d. The given timeslots are invalid.
+    * 5d1. System shows an error message.
+
+      Use case ends.
+* 5e. The student exists in the database already.
+    * 5e1. System shows an error message.
+
+      Use case ends.
 
 **Use case:** UC04 - Delete a student.<br>
 

docs/UserGuide.md

@@ -90,7 +90,7 @@ Format: `add n/NAME p/PHONE_NUMBER e/EMAIL a/ADDRESS [t/TIMESLOTS]…​ [g/GRAD
 
 Examples:
 * `add n/John Doe p/98765432 e/[email protected] a/John street, block 123, #01-01`
-* `add n/Betsy Crowe e/[email protected] a/Newgate Prison p/1234567 t/Saturday 5pm-7pm g/ca1: 2`
+* `add n/Betsy Crowe e/[email protected] a/Newgate Prison p/1234567 t/Saturday 5pm-7pm g/ca1: 2 g/ca2: 80`
 
 ### Listing all students : `list`
 
@@ -105,13 +105,16 @@ Edits an existing student in the TutorTrack.
 Format: `edit INDEX !n | !p | !e | !a | !t | !g`
 
 * Edits the student at the specified `INDEX`. The index refers to the index number shown in the displayed student list. The index **must be a positive integer** 1, 2, 3, …​
-* Only one of the variable fields must be provided.
+* **Only one** of the `VARIABLE` field must be provided.
 * Existing values will be updated to the input values.
-* Adding and modifying multiple tags and grades are allowed, i.e. they will not be overwritten.
+* Allow modifications (add/edit/delete) in timeslots and grades, i.e. they will not be overwritten. 
+  * Add: Separate using commas, i.e. `edit 2 grade: ca1: 2, ca2: 80` to `edit 2 grade: ca1: 2, ca2: 80, ca3: 66`
+  * Edit: Make changes to the current data, i.e. `edit 2 timeslot: Saturday 5pm-7pm` to `edit 2 timeslot: Monday 2pm-3pm`
+  * Delete: Remove the data, i.e. `edit 2 grade: ca1: 2, ca2: 80, ca3: 66` to `edit 2 grade: ca1: 2, ca3: 66`
 
 Examples:
-*  `edit 1 !p` will display `edit 1 phone: {previous phone number}`, prompting user to make changes to the phone number of the 1st student.
-*  `edit 2 !g` will display `edit 2 grade: {previous grades}`, prompting user to add (single or multiple) additional grades or modify current grades of the 2nd student.
+*  `edit 1 !p` will display `edit 1 phone: {current phone number}`, prompting user to make changes to the phone number of the 1st student.
+*  `edit 2 !g` will display `edit 2 grade: {current grades}`, prompting user to modify (add/edit/delete) grades of the 2nd student.
 
 ### Locating students by name: `find`