diff --git a/app/library/models.py b/app/library/models.py
index 26a362c..b8bec5e 100644
--- a/app/library/models.py
+++ b/app/library/models.py
@@ -44,13 +44,13 @@ class Orchestration(models.Model):
     def as_list(self):
         tags = [ t.strip() for t in self.instruments.split(' ') ]
         return [ (t, MusicTag.from_tag(t)) for t in tags if t ]
-    
+
     def tag_order(self):
         tags = [ t.strip() for t in self.instruments.split(' ') if t ]
         order = {'score': 0}
         for i, t in enumerate(tags):
             order.setdefault(t.strip('-0123456789'), i*2+1)
-            
+
         return order
 
     def sorter(self):
@@ -79,14 +79,13 @@ class ProjectItem(models.Model):
     approved_by = models.ForeignKey('auth.User', on_delete=models.CASCADE)
     order = models.SmallIntegerField(default=0)
     section = models.CharField(max_length=100, blank=True)
-    
 
     class Meta:
         ordering = ['order', 'work']
 
     def __str__(self):
         return f"<{self.project_id}:{slugify(self.work.name)}>"
-  
+
 class Collection(models.Model):
     """
     A logical collection of works, typically owned by an organisation or person (physical or virtual)
@@ -95,13 +94,13 @@ class Collection(models.Model):
             help_text="Name of the collection")
     prefix = models.CharField(max_length=255, default="default",
             help_text="Folder to store works in")
-    administrators = models.ManyToManyField('auth.User', related_name="collections", 
+    administrators = models.ManyToManyField('auth.User', related_name="collections",
             help_text="Administrators for this collection")
-    location = models.CharField(max_length=100, 
+    location = models.CharField(max_length=100,
             help_text="Physical location (institution, town...)", blank=True)
-    storage = models.ForeignKey('byostorage.UserStorage', on_delete=models.CASCADE, null=True, blank=True, 
+    storage = models.ForeignKey('byostorage.UserStorage', on_delete=models.CASCADE, null=True, blank=True,
             help_text="User storage for documents")
-    notes = models.TextField(blank=True, 
+    notes = models.TextField(blank=True,
             help_text="Publicly visible notes about collection and loans policy (markdown format)")
     settings = models.JSONField(default=dict, blank=True,
             help_text="Storage specific settings")
@@ -118,8 +117,8 @@ class Collection(models.Model):
 
     @property
     def genres(self):
-        return self.meta('genre')    
-    
+        return self.meta('genre')
+
     def has_administrator(self, user):
         if not user.is_authenticated:
             return False
@@ -132,7 +131,7 @@ class Collection(models.Model):
 
     def auth(self):
         return sign_data(f'{self.pk}-{self.nonce}', 12)
-    
+
     def __str__(self):
         return self.name
 
@@ -176,7 +175,7 @@ class Work(models.Model):
         (LICENCE_PERUSAL, 'Perusal Licence'),
         (LICENCE_NONE, 'Internal use only'),
     )
-    
+
     name = models.CharField(max_length=255, help_text="Original name of the work")
     edition = models.CharField(max_length=255, blank=True,
             help_text="Edition details to distinguish multiple versions")
@@ -193,7 +192,7 @@ class Work(models.Model):
     code = models.CharField(max_length=100, blank=True, help_text="Collection specific code or number. Will be auto-generated if not supplied")
     licence = models.PositiveSmallIntegerField(choices=LICENCE_TYPES, default=6, help_text="Copyright status")
     max_projects = models.IntegerField(default=1, help_text="How many active projects can this work be attached to")
-    
+
     # Extra info
     running_time = models.DurationField(null=True, blank=True, help_text="Running time in mm:ss format")
     notes = models.TextField(blank=True)
@@ -221,7 +220,7 @@ class Work(models.Model):
         #return [ s[1] for s in sections ]
         sections = list(dict(sections).items()) # primitive unique()
         return sections
-    
+
     def pdfs(self):
         return self.docs.filter(doctype=Document.DOCTYPE_PDF)
 
@@ -306,7 +305,7 @@ class WorkMeta(models.Model):
         ('style', 'Style'),
         ('orchestration', 'Orchestration'),
     )
-    
+
     work = models.ForeignKey(Work, on_delete=models.CASCADE, related_name='meta_info')
     name = models.SlugField(max_length=20, choices=META_CHOICES)
     value = models.CharField(max_length=255)
@@ -350,7 +349,7 @@ class Document(models.Model):
     def delete(self, *args, **kwargs):
         self.upload.delete(save=False)
         return super().delete(*args, **kwargs)
-    
+
     def filename(self):
         return os.path.basename(self.upload.name)
 
@@ -361,7 +360,7 @@ class Section(models.Model):
     """
     Section is a tagged portion of a Document
     """
-    
+
     PAGE_AUTO = 0
     PAGE_LEFT = 1
     PAGE_RIGHT = 2
@@ -398,7 +397,7 @@ class Section(models.Model):
     def filename(self):
         return slugify(f'{self.doc.work.name} - {self.name}').title() + '.pdf'
 
-    @property 
+    @property
     def pagerange(self):
         if self.start:
             if self.end:
@@ -408,3 +407,4 @@ class Section(models.Model):
 
     def __str__(self):
         return self.name
+