Update UserGuide

docs/UserGuide.md

@@ -206,17 +206,17 @@ Format: `alias k/KEYWORD r/REPRESENTATION`
 
 > Parameters | Description  
 > -------- | :-------- 
-> KEYWORD | Specifies the keyword that will be replaced when met in a command
+> KEYWORD | Specifies the keyword that will be replaced when met in a command, must be a single word
 > REPRESENTATION | Specifies the text that will replace the keyword
 
 Examples: 
 * `alias k/pjm r/Project Meeting`<br>
 System will interpret subsequent keywords "pjm" as "Project Meeting"<br>
   `add pjm s/05-10-2016 st/14:00 et/18:00 r/daily n/2 c/CS2103`<br>
-Add "Project Meeting" to task list<br>
->Note that only keywords must be a single word by themselves, or they will not be replaced.
-The below example shows 'pjm' as part of another word and it is not replaced with its representation.
-inside another word
+Add "Project Meeting" to task list<br><br>
+
+> Note that only keywords must be a single word by themselves, or they will not be replaced.
+> The below example shows 'pjm' as part of another word and it is not replaced with its representation.
   `add pjm2 s/05-10-2016 st/14:00 et/18:00 r/daily n/2 c/CS2103`<br>
 Add "pjm2" to task list, and <b>not</b> "Project Meeting2"<br>