updated contribution rules

docs/contribution.md

@@ -76,7 +76,7 @@ All new features must be accompinied by [clear documentation](./api.md). All new
 	- Examples: [`.get()`](./api.md#getbindparameters---row), [`new Database()`](./api.md#new-databasepath-options)
 - Function signatures are written as: .funcName(*requiredArg*, [*optionalArg*]) -> *returnValue*
 	- Note that the arguments and return values are *italicized*
-	- Note that optional arguments are surrounded by [square brackets]
+	- Note that optional arguments are surrounded by square brackets []
 - All code examples should be highlighted using `js` syntax, except for bash commands which don't need highlighting
 
 ## Categories of contribution