Excess whitespace before ',' (E141)
There should not be whitespace before a comma.
Anti-pattern
FooSub 1 , 2
Best practice
FooSub 1, 2
Exceptions
FooSub , , 3
There should not be whitespace before a comma.
FooSub 1 , 2
FooSub 1, 2
FooSub , , 3