capturing.rb in nanoc-4.8.6

- old
+ new

@@ -128,11 +128,11 @@
           else
             raise ArgumentError, 'expected 2 or 3 arguments (the name ' \
               "of the capture, optionally params, and the content) but got #{args.size} instead"
           end
 
-        _erbout = String.new # rubocop:disable Lint/UnderscorePrefixedVariableName
+        _erbout = +'' # rubocop:disable Lint/UnderscorePrefixedVariableName
         SetContent.new(name, params, @item).run { _erbout << content }
       else # Get content
         if args.size != 2
           raise ArgumentError, 'expected 2 arguments (the item ' \
             "and the name of the capture) but got #{args.size} instead"
@@ -155,10 +155,10 @@
 
       # Get new piece of erbout
       erbout_addition = erbout[erbout_length..-1]
 
       # Remove addition
-      erbout[erbout_length..-1] = String.new
+      erbout[erbout_length..-1] = +''
 
       # Depending on how the filter outputs, the result might be a
       # single string or an array of strings (slim outputs the latter).
       erbout_addition = erbout_addition.join('') if erbout_addition.is_a? Array
 