old_contents: """Utility functions for finding modules
  
  Utility functions for finding modules on sys.path.
  
  `find_module` returns a path to module or None, given certain conditions.
  
  """
  #-----------------------------------------------------------------------------
  # Copyright (c) 2011, the IPython Development Team.
  #
  # Distributed under the terms of the Modified BSD License.
  #
  # The full license is in the file COPYING.txt, distributed with this software.
  #-----------------------------------------------------------------------------
  
  #-----------------------------------------------------------------------------
  # Imports
  #-----------------------------------------------------------------------------
  
  # Stdlib imports
  import importlib
  import os
  import sys
  
  # Third-party imports
  
  # Our own imports
  
  
  #-----------------------------------------------------------------------------
  # Globals and constants
  #-----------------------------------------------------------------------------
  
  #-----------------------------------------------------------------------------
  # Local utilities
  #-----------------------------------------------------------------------------
  
  #-----------------------------------------------------------------------------
  # Classes and functions
  #-----------------------------------------------------------------------------
  
  def find_mod(module_name):
      """
      Find module `module_name` on sys.path, and return the path to module `module_name`.
  
        - If `module_name` refers to a module directory, then return path to __init__ file.
          - If `module_name` is a directory without an __init__file, return None.
        - If module is missing or does not have a `.py` or `.pyw` extension, return None.
          - Note that we are not interested in running bytecode.
        - Otherwise, return the fill path of the module.
  
      Parameters
      ----------
      module_name : str
  
      Returns
      -------
      module_path : str
          Path to module `module_name`, its __init__.py, or None,
          depending on above conditions.
      """
      loader = importlib.util.find_spec(module_name)
      module_path = loader.origin
      if module_path is None:
          if loader.loader in sys.meta_path:
              return loader.loader
          return None
      else:
          split_path = module_path.split(".")
          if split_path[-1] in ["py", "pyw"]:
              return module_path
          else:
              return None
  
new_contents: """Utility functions for finding modules
  
  Utility functions for finding modules on sys.path.
  
  """
  #-----------------------------------------------------------------------------
  # Copyright (c) 2011, the IPython Development Team.
  #
  # Distributed under the terms of the Modified BSD License.
  #
  # The full license is in the file COPYING.txt, distributed with this software.
  #-----------------------------------------------------------------------------
  
  #-----------------------------------------------------------------------------
  # Imports
  #-----------------------------------------------------------------------------
  
  # Stdlib imports
  import importlib
  import os
  import sys
  
  # Third-party imports
  
  # Our own imports
  
  
  #-----------------------------------------------------------------------------
  # Globals and constants
  #-----------------------------------------------------------------------------
  
  #-----------------------------------------------------------------------------
  # Local utilities
  #-----------------------------------------------------------------------------
  
  #-----------------------------------------------------------------------------
  # Classes and functions
  #-----------------------------------------------------------------------------
  
  def find_mod(module_name):
      """
      Find module `module_name` on sys.path, and return the path to module `module_name`.
  
        - If `module_name` refers to a module directory, then return path to __init__ file.
          - If `module_name` is a directory without an __init__file, return None.
        - If module is missing or does not have a `.py` or `.pyw` extension, return None.
          - Note that we are not interested in running bytecode.
        - Otherwise, return the fill path of the module.
  
      Parameters
      ----------
      module_name : str
  
      Returns
      -------
      module_path : str
          Path to module `module_name`, its __init__.py, or None,
          depending on above conditions.
      """
      spec = importlib.util.find_spec(module_name)
      module_path = spec.origin
      if module_path is None:
          if spec.loader in sys.meta_path:
              return spec.loader
          return None
      else:
          split_path = module_path.split(".")
          if split_path[-1] in ["py", "pyw"]:
              return module_path
          else:
              return None
  
subject: Fix confusing things