Merge pull request nus-cs2103-AY2021S2#44 from maikongeh/master

Update UserGuide.md -list assignments/events

Author: maikongeh

docs/UserGuide.md

@@ -147,7 +147,7 @@ Shows a list of all events. Events are sorted by date
 
 Format: `list`
 
-### Listing all assignments : `list assignments `
+### Listing all assignments : `list assignments`
 
 Shows a list of all assignments. Assignments are sorted by date.