Use parentheses

app/controllers/admin/gestionnaires_controller.rb

@@ -61,7 +61,7 @@ class Admin::GestionnairesController < AdminController
   end
 
   def assign_gestionnaire!
-    if current_administrateur.gestionnaires.include? @gestionnaire
+    if current_administrateur.gestionnaires.include?(@gestionnaire)
       flash.alert = 'Instructeur déjà ajouté'
     else
       @gestionnaire.administrateurs.push current_administrateur

app/lib/file_size_validator.rb

@@ -41,7 +41,7 @@ class FileSizeValidator < ActiveModel::EachValidator
   end
 
   def validate_each(record, attribute, value)
-    if !value.kind_of? CarrierWave::Uploader::Base
+    if !value.kind_of?(CarrierWave::Uploader::Base)
       raise(ArgumentError, "A CarrierWave::Uploader::Base object was expected")
     end
 

app/services/clamav_service.rb

@@ -4,7 +4,7 @@ class ClamavService
       return true
     end
 
-    FileUtils.chmod 0666, file_path
+    FileUtils.chmod(0666, file_path)
 
     client = ClamAV::Client.new
     response = client.execute(ClamAV::Commands::ScanCommand.new(file_path))

app/services/pieces_justificatives_service.rb

@@ -17,7 +17,7 @@ class PiecesJustificativesService
 
   def self.upload_one!(dossier, user, params)
     content = params[:piece_justificative][:content]
-    if ClamavService.safe_file? content.path
+    if ClamavService.safe_file?(content.path)
       pj = PieceJustificative.new(content: content,
         dossier: dossier,
         type_de_piece_justificative: nil,