Fix linting errorsg

Author: TomNaessens

app/controllers/concerns/data_table.rb

@@ -80,7 +80,7 @@ def sanitize_params(params)
       length: params.require(:length).to_i,
       columns: {}
     }
-    params.require(:columns).each do |_, column|
+    params.require(:columns).each_value do |column|
       type, *values = column.require(:search)[:value].split(":")
       value = values.join(":") unless values.empty?
       h = clean[:columns][column.require(:data).to_sym] = {

app/models/concerns/transaction_helpers.rb

@@ -6,6 +6,8 @@ module TransactionHelpers
   def peer_of(user)
     return creditor if user == debtor
     return debtor   if user == creditor
+
+    raise "User is not a peer of this transaction"
   end
 
   def client_transaction?