Adjust blank lines to match Code Style Guide (see #103)

src/albumheaderbar.py

@@ -1,15 +1,13 @@
 #!/usr/bin/env python3
 
-
 import gi
+
 gi.require_version('Gtk', '4.0')
 gi.require_version('Adw', '1')
 
 from gi.repository import Gtk, GObject, Adw
 
 
-
-
 @Gtk.Template(resource_path='/xyz/suruatoel/mcg/ui/album-headerbar.ui')
 class AlbumHeaderbar(Adw.Bin):
     __gtype_name__ = 'McgAlbumHeaderbar'
@@ -21,16 +19,13 @@ class AlbumHeaderbar(Adw.Bin):
     standalone_title = Gtk.Template.Child()
     standalone_artist = Gtk.Template.Child()
 
-
     def __init__(self):
         super().__init__()
 
-
     @Gtk.Template.Callback()
     def on_close_clicked(self, widget):
         self.emit('close')
 
-
     def set_album(self, album):
         self.standalone_title.set_text(album.get_title())
         self.standalone_artist.set_text(", ".join(album.get_albumartists()))