Add line to DeveloperGuide.md

docs/DeveloperGuide.md

@@ -156,14 +156,14 @@ Priorities: High (Must have) - `* * *`, Medium (Good to have) - `* *`, Low (Exte
 *{More to be added}*
 
 
-### Non-Functional Requirements 
-1) The system should be primarily command-line based. 
+### Non-Functional Requirements
+1) The system should be primarily command-line based.
 2) A user who can type fast should be able to accomplish tasks faster through this system compared to using 
-one which relies on the mouse. 
+one which relies on the mouse.
 3) The system can be used by a user who can understand and write english easily with a minimal learning curve.
 4) The system should use Gradle as a build automation tool, and it must run on any OS which has Java 17.
 5) All reservation details will be stored in a file saved locally which should allow read and write access to the
 system.
-6) The maximum number of reservation the system can hold is 100. 
+6) The maximum number of reservation the system can hold is 100.
 7) All code pushed into the repository must adhere to checkstyle to ensure readability and maintainability.
-8) The system is designed for a single-user. 
+8) The system is designed for a single-user.