old_contents: """
  This module contains user interface related code, such as the
  main screen and diagram windows.
  """
  
  from gi.repository import Gtk, Gdk
  import pkg_resources
  import os.path
  
  icon_theme = Gtk.IconTheme.get_default()
  icon_theme.append_search_path(
      os.path.abspath(pkg_resources.resource_filename("gaphor.ui", "pixmaps"))
  )
  
  import re
  
  
  def _repl(m):
      v = m.group(1).lower()
      return len(v) == 1 and v or "%c-%c" % tuple(v)
  
  
  _repl.expr = "(.?[A-Z])"
  
  
  def icon_for_element(element):
      return re.sub(_repl.expr, _repl, type(element).__name__)
  
  # Set style for model canvas
  css_provider = Gtk.CssProvider.new()
  screen = Gdk.Display.get_default().get_default_screen()
  
  Gtk.StyleContext.add_provider_for_screen(screen, css_provider, Gtk.STYLE_PROVIDER_PRIORITY_APPLICATION)
  css_provider.load_from_data("#diagram-tab { background: white }".encode("utf-8"))
  
new_contents: """
  This module contains user interface related code, such as the
  main screen and diagram windows.
  """
  
  from gi.repository import Gtk, Gdk
  import pkg_resources
  import os.path
  
  icon_theme = Gtk.IconTheme.get_default()
  icon_theme.append_search_path(
      os.path.abspath(pkg_resources.resource_filename("gaphor.ui", "pixmaps"))
  )
  
  import re
  
  
  def _repl(m):
      v = m.group(1).lower()
      return len(v) == 1 and v or "%c-%c" % tuple(v)
  
  
  _repl.expr = "(.?[A-Z])"
  
  
  def icon_for_element(element):
      return re.sub(_repl.expr, _repl, type(element).__name__)
  
  
  # Set style for model canvas
  css_provider = Gtk.CssProvider.new()
  screen = Gdk.Display.get_default().get_default_screen()
  
  Gtk.StyleContext.add_provider_for_screen(
      screen, css_provider, Gtk.STYLE_PROVIDER_PRIORITY_APPLICATION
  )
  css_provider.load_from_data("#diagram-tab { background: white }".encode("utf-8"))
  
subject: Fix formatting