Fix style issues

docs/DeveloperGuide.md

@@ -961,25 +961,31 @@ testers are expected to do more *exploratory* testing.
 
 1. Lending money to a person when all persons are being shown
 
-   1. Prerequisites: List all persons using the `list` command. Multiple persons in the list with money owed $0.
+   1. Prerequisites: List all persons using the `list` command. Multiple persons in the list with first contact having
+$0 for money owed.
 
    1. Test case: `lend 1 $/50`<br>
       Expected: First contact in the list now owes you $50 more.
+
    1. Test case: `lend x $/50` (where x is larger than list size)<br>
       Expected: Amount owed of all contacts remain the same, error details show that index is invalid.
+
    1. Test case: `lend 1 $/100001`<br>
       Expected: Amount owed of first contact remains the same, error details shown in status message.
 
 ### Splitting an amount between user and a group
 
 1. Splitting an amount between user and a group when all persons are being shown
 
-    1. Prerequisites: List all persons using the `list` command. Multiple persons in the list with money owed $0.
+    1. Prerequisites: List all persons using the `list` command. Multiple persons in the list with first and second
+contact having $0 for money owed.
 
     1. Test case: `split 1 2 $/30`<br>
        Expected: First and second contact in the list now owe you $10 more.
+
     1. Test case: `split 1 2 $/-30`<br>
        Expected: Amount owed of first and second contacts remain the same, error details shown in status message.
+
     1. Test case: `split 1 2 $/100001`<br>
        Expected: Amount owed of first and second contacts remain the same, error details shown in status message.
 
@@ -991,8 +997,10 @@ testers are expected to do more *exploratory* testing.
 
     1. Test case: `remark 1 r/He likes to swim`<br>
        Expected: First contact now has remark `He likes to swim`.
+
     1. Test case: `remark 1 r/`<br>
        Expected: First contact now has empty remark.
+
     1. Test case: `remark x r/She likes to jog` (where x is larger than list size)<br>
        Expected: Remark of all contacts remain the same, error details shown in status message.