old_contents: # -*- encoding, utf-8 -*-
  
  from collections import OrderedDict
  
  WTF_CSRF_ENABLED = True
  SECRET_KEY = 'Pygments is a generic syntax highlighter'
  
  # Select the lexers to be exposed in the interface
  from pygments.lexers import *
  
  SELECTED_LEXERS = OrderedDict([
      ('Python',          PythonLexer),
      ('Python console',  PythonConsoleLexer),
      ('C',               CLexer),
      ('C++',             CppLexer),
      ('Bash/Ksh',        BashLexer),
      ('Bash console',    BashSessionLexer),
      ('Go',              GoLexer),
      ('Rust',            RustLexer),
      ('JavaScript',      JavascriptLexer),
      ('JSON',            JsonLexer),
      ('XML',             XmlLexer),
  ])
  
  # Select the style used by Pygments
  PYGMENTS_STYLE = 'default'
  
new_contents: # -*- encoding, utf-8 -*-
  
  from collections import OrderedDict
  
  WTF_CSRF_ENABLED = True
  SECRET_KEY = 'Pygments is a generic syntax highlighter'
  
  # Select the lexers to be exposed in the interface
  from pygments.lexers import *
  
  SELECTED_LEXERS = OrderedDict([
      ('Python',          PythonLexer),
      ('Python console',  PythonConsoleLexer),
      ('C',               CLexer),
      ('C++',             CppLexer),
      ('Bash/Ksh',        BashLexer),
      ('Bash console',    BashSessionLexer),
      ('Go',              GoLexer),
      ('Rust',            RustLexer),
      ('JavaScript',      JavascriptLexer),
      ('JSON',            JsonLexer),
      ('XML',             XmlLexer),
      ('Diff',            DiffLexer),
  ])
  
  # Select the style used by Pygments
  PYGMENTS_STYLE = 'default'
  
subject: Add DiffLexer