join doesn't work with repeat minimum of 0

[phipsgabler]

I want to parse zero or more things, separated by commas. However, join always includes at least one repetition:

julia> Repeat("a", max=2)("")
SubString{String}[]

julia> Repeat("a", max=2)("a")
1-element Vector{SubString{String}}:
 "a"

julia> join(Repeat("a", max=2), ",")
🗄 Sequence |> map(#90)
├─ a 
└─ ,a{,1} Sequence |> map(#68) |> Repeat
::Vector{SubString{String}}


julia> join(Repeat("a", max=2), ",")("a")
1-element Vector{SubString{String}}:
 "a"

julia> join(Repeat("a", max=2), ",")("")
ERROR: ArgumentError: no successfull parsing.
...