Transform table - unfill with join text

lukinfo 

Paste the below M code in a new query and check the steps:

let
    Source = Table.FromRows(Json.Document(Binary.Decompress(Binary.FromText("i45W8k0sylbSUTI2ABKeeWn5Ci5KsTrRSkCeiRFMKAgmZGgJE3LGVOUOEwKbFZJaUaJgAtdoCBMyBwuF5OdVglSaAgmXxBIFR5hCIxOoCNxOYwuwSJFCCFyNGUgkNQ/q1JDMXJAN5lBBuMtMDaAijijOD88vQnK9OVQE7ngjiEgJQo0xWCQxT8EXxUnhidkgB8QCAA==", BinaryEncoding.Base64), Compression.Deflate)), let _t = ((type nullable text) meta [Serialized.Text = true]) in type table [Name = _t, Value = _t, Info = _t]),
    #"Replaced Value" = Table.ReplaceValue(Source,"",null,Replacer.ReplaceValue,{"Name"}),
    #"Filled Down" = Table.FillDown(#"Replaced Value",{"Name"}),
    #"Grouped Rows" = Table.Group(#"Filled Down", {"Name"}, {{"Count", each Text.Combine([Info],","), type nullable text}}),
    Custom1 = #"Replaced Value",
    #"Added Custom" = Table.AddColumn(Source, "Info2", each if Text.Length([Name]) > 0 then 
let nm = [Name] in  Table.SelectRows( #"Grouped Rows" , each [Name] = nm )[Count]{0}
 else "")
in
    #"Added Custom"