old_contents: # --------------------------------------------------------------------------------------------------
  # Ibis: a lightweight template engine.
  #
  # How it works: A lexer transforms a template string into a sequence of tokens. A parser takes this
  # sequence and compiles it into a tree of nodes. Each node has a .render() method which takes a
  # context object and returns a string. The entire compiled node tree can be rendered by calling
  # .render() on the root node.
  #
  # Compiling and rendering the node tree are two distinct processes. The template only needs to be
  # compiled once, it can then be cached and rendered multiple times with different context objects.
  #
  # The Template class acts as the public interface to the template engine. This is the only class
  # the end-user needs to interact with directly. A Template object is initialized with a template
  # string. It compiles the string and stores the resulting node tree for future rendering. Calling
  # the template object's .render() method with a dictionary of key-value pairs or a set of keyword
  # arguments renders the template and returns the result as a string.
  #
  # Example:
  #
  #     >>> template = Template('{{foo}} and {{bar}}')
  #
  #     >>> template.render(foo='ham', bar='eggs')
  #     'ham and eggs'
  #
  #     >>> template.render({'foo': 1, 'bar': 2})
  #     '1 and 2'
  #
  # --------------------------------------------------------------------------------------------------
  
  from . import filters
  from . import nodes
  from . import loaders
  from . import errors
  from . import compiler
  
  from .template import Template
  
  
  # Library version.
  __version__ = "2.0.0-alpha.1"
  
  
  # Assign a template-loading callable here to enable the {% include %} and {% extends %} tags.
  # The callable should accept one or more string arguments and either return an instance of the
  # Template class or raise a TemplateLoadError exception.
  loader = None
  
new_contents: from . import filters
  from . import nodes
  from . import loaders
  from . import errors
  from . import compiler
  
  from .template import Template
  
  
  # Library version.
  __version__ = "2.0.0-alpha.1"
  
  
  # Assign a template-loading callable here to enable the {% include %} and {% extends %} tags.
  # The callable should accept one or more string arguments and either return an instance of the
  # Template class or raise a TemplateLoadError exception.
  loader = None
  
subject: Remove header comment, duplicated in docs