Use safe navigation operator (#238)

Author: ntkme

ext/sass/Rakefile

@@ -83,9 +83,7 @@ file 'cli.rb' => %w[dart-sass] do |t|
           INTERPRETER = '#{interpreter}'
 
           COMMAND = [
-            *(ELF::INTERPRETER unless ELF::INTERPRETER.nil? ||
-                                      ELF::INTERPRETER == INTERPRETER ||
-                                      !ELF::INTERPRETER.end_with?(INTERPRETER)),
+            *(ELF::INTERPRETER if ELF::INTERPRETER != INTERPRETER && ELF::INTERPRETER&.end_with?(INTERPRETER)),
             #{command_source}
           ].freeze
         end