Add Pry::Helpers::Text#with_line_numbers.

lib/pry/default_commands/input.rb

@@ -53,8 +53,8 @@ class Pry
           end
 
           opt.on_empty do
-            text = add_line_numbers history.join("\n"), 0
+            list = text.with_line_numbers history.join("\n"), 0
-            stagger_output text
+            stagger_output list
           end
         end
       end

lib/pry/helpers/command_helpers.rb

@@ -23,14 +23,6 @@ class Pry
         end
       end
 
-      def add_line_numbers(lines, start_line)
-        line_array = lines.each_line.to_a
-        line_array.each_with_index.map do |line, idx|
-          adjusted_index = idx + start_line
-          "#{text.blue adjusted_index}: #{line}"
-        end.join
-      end
-
       # if start_line is not false then add line numbers starting with start_line
       def render_output(should_flood, start_line, doc)
         if start_line

lib/pry/helpers/text.rb

@@ -62,6 +62,18 @@ class Pry
         Pry.color = boolean
       end
 
+      # Returns _text_ in a numbered list, beginning at _offset_.
+      # 
+      # @param  [String, #each_line] text
+      # @param  [Fixnum] offset
+      # @return [String]
+      def with_line_numbers text, offset
+        lines = text.each_line.to_a
+        lines.each_with_index.map do |line, index|
+          adjusted_index = index + offset
+          "#{self.blue adjusted_index}: #{line}"
+        end.join
+      end
     end
 
   end