diff -r 4d93f4ed95bc -r 63be3ce389f7 src/notes/models/category.py
--- a/src/notes/models/category.py	Wed Jun 14 12:28:09 2017 +0200
+++ b/src/notes/models/category.py	Wed Jun 14 15:17:51 2017 +0200
@@ -11,24 +11,33 @@
 
 class Protocol(Model):
     title = models.CharField(max_length=255, verbose_name=_('Protocol|title'))
-    group_profile = models.OneToOneField(GroupProfile, on_delete=models.CASCADE)
+    group_profile = models.OneToOneField(
+        GroupProfile, on_delete=models.CASCADE)
+
     class Meta:
         verbose_name = _('Protocol')
         verbose_name_plural = _('Protocols')
 
 
-
 class Category(models.Model):
     title = models.CharField(max_length=255, verbose_name=_('Category|title'))
     color = RGBColorField(verbose_name=_('Category|color'))
-    need_comment = models.BooleanField(default=False, verbose_name=_('Category|need_comment'))
-    description = models.TextField(null=True, blank=True, verbose_name=_('Category|description'))
+    need_comment = models.BooleanField(
+        default=False,
+        verbose_name=_('Category|need_comment')
+    )
+    description = models.TextField(
+        null=True,
+        blank=True,
+        verbose_name=_('Category|description')
+    )
     protocol = models.ForeignKey(
         Protocol,
         verbose_name=_('Category|protocol'),
         related_name='categories',
         on_delete=models.CASCADE
     )
+
     class Meta:
         verbose_name = _('Category')
         verbose_name_plural = _('Categories')