a b c		= 1
# comment
[\ a b \#no comment]	#comment
\ a b c		= 2
[a b c]
a b c\ 		= 3
[a,b\,c]

\ a b c\ 	= 4 # comment
[\ a,b,c\ ]
a b c		= 5,6,7
[a,b,c\ ]
\ a b c		= 8\,9,10
[a,b,c]
a b c\ 		= 11,12\,13
[a\,b,c]
\ a b c\ 	= \ 14	# comment
[\ ]	# comment
a \ b \ c	= 15\#no comment
[]
a b c		= 16
a,b,c,d,e	= 18	# comment
[_]
a b c		= 19
a,b,c,d,e	= 20	# comment