lib/rley/formatter/asciitree.rb in rley-0.7.03 vs lib/rley/formatter/asciitree.rb in rley-0.7.04

@@ -1,5 +1,7 @@
+# frozen_string_literal: true
+
 require_relative 'base_formatter'
 
 
 module Rley # This module is used as a namespace
   # Namespace dedicated to parse tree formatters.
@@ -98,10 +100,10 @@
 
       # 'root', 'first', 'first_and_last', 'last', 'other'
       def path_prefix()
         return '' if ranks.empty?
 
-        prefix = ''
+        prefix = +''
         @ranks.each_with_index do |rank, i|
           next if i.zero?
 
           case rank
             when 'first', 'other'