Change the method name from content_with_module to create_initialized_content

Author: 小野 直人

test/tool/test_builder.rb

@@ -186,7 +186,7 @@ def line_num_temp(indent_num, index, line)
       "#{' ' * indent_num}#{index + 2}| #{line}"
     end
 
-    def content_with_module
+    def create_initialized_content
       <<~TEST
         # frozen_string_literal: true
 
@@ -216,7 +216,7 @@ def create_file
       if content
         puts "appended: #{path}"
       else
-        content = content_with_module
+        content = create_initialized_content
         puts "created: #{path}"
         puts "    class: #{@class}"
       end